Measurement of J/ψ polarization in pp collisions at [Formula: see text]

An angular analysis of the decay J/ψ→μ+μ- is performed to measure the polarization of prompt J/ψ mesons produced in pp collisions at [Formula: see text]. The dataset corresponds to an integrated luminosity of 0.37 fb-1 collected with the LHCb detector. The measurement is presented as a function of transverse momentum, pT, and rapidity, y, of the J/ψ meson, in the kinematic region 2 Collapse

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Affiliation(s)

The LHCb Collaboration CERN, 1211 Geneva 23, Switzerland
R. Aaij Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
C. Abellan Beteta Universitat de Barcelona, Barcelona, Spain
B. Adeva Universidad de Santiago de Compostela, Santiago de Compostela, Spain
M. Adinolfi H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
C. Adrover CNRS/IN2P3, CPPM, Aix-Marseille Université, Marseille, France
A. Affolder Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
Z. Ajaltouni CNRS/IN2P3, LPC, Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
J. Albrecht Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
F. Alessio European Organization for Nuclear Research (CERN), Geneva, Switzerland
M. Alexander School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
S. Ali Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
G. Alkhazov Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia
P. Alvarez Cartelle Universidad de Santiago de Compostela, Santiago de Compostela, Spain
A. A. Alves Sezione INFN di Roma La Sapienza, Roma, Italy European Organization for Nuclear Research (CERN), Geneva, Switzerland
S. Amato Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
S. Amerio Sezione INFN di Padova, Padova, Italy
Y. Amhis LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
L. Anderlini Sezione INFN di Firenze, Firenze, Italy
J. Anderson Physik-Institut, Universität Zürich, Zürich, Switzerland
R. Andreassen University of Cincinnati, Cincinnati, OH United States
R. B. Appleby School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
O. Aquines Gutierrez Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
F. Archilli Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy
A. Artamonov Institute for High Energy Physics (IHEP), Protvino, Russia
M. Artuso Syracuse University, Syracuse, NY United States
E. Aslanides CNRS/IN2P3, CPPM, Aix-Marseille Université, Marseille, France
G. Auriemma Sezione INFN di Roma La Sapienza, Roma, Italy
S. Bachmann Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
J. J. Back Department of Physics, University of Warwick, Coventry, United Kingdom
C. Baesso Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil
V. Balagura Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
W. Baldini Sezione INFN di Ferrara, Ferrara, Italy
R. J. Barlow School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
C. Barschel European Organization for Nuclear Research (CERN), Geneva, Switzerland
S. Barsuk LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
W. Barter Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
Th. Bauer Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
A. Bay Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
J. Beddow School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
F. Bedeschi Sezione INFN di Pisa, Pisa, Italy
I. Bediaga Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil
S. Belogurov Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
K. Belous Institute for High Energy Physics (IHEP), Protvino, Russia
I. Belyaev Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
E. Ben-Haim LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France
M. Benayoun LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France
G. Bencivenni Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy
S. Benson School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
J. Benton H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
A. Berezhnoy Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia
R. Bernet Physik-Institut, Universität Zürich, Zürich, Switzerland
M.-O. Bettler Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
M. van Beuzekom Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
A. Bien Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
S. Bifani University of Birmingham, Birmingham, United Kingdom
T. Bird School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
A. Bizzeti Sezione INFN di Firenze, Firenze, Italy
P. M. Bjørnstad School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
T. Blake European Organization for Nuclear Research (CERN), Geneva, Switzerland
F. Blanc Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
J. Blouw Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
S. Blusk Syracuse University, Syracuse, NY United States
V. Bocci Sezione INFN di Roma La Sapienza, Roma, Italy
A. Bondar Budker Institute of Nuclear Physics (SB RAS) and Novosibirsk State University, Novosibirsk, Russia
N. Bondar Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia
W. Bonivento Sezione INFN di Cagliari, Cagliari, Italy
S. Borghi School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
A. Borgia Syracuse University, Syracuse, NY United States
T. J. V. Bowcock Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
E. Bowen Physik-Institut, Universität Zürich, Zürich, Switzerland
C. Bozzi Sezione INFN di Ferrara, Ferrara, Italy
T. Brambach Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
J. van den Brand Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands
J. Bressieux Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
D. Brett School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
M. Britsch Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
T. Britton Syracuse University, Syracuse, NY United States
N. H. Brook H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
H. Brown Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
I. Burducea Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
A. Bursche Physik-Institut, Universität Zürich, Zürich, Switzerland
G. Busetto Sezione INFN di Padova, Padova, Italy
J. Buytaert European Organization for Nuclear Research (CERN), Geneva, Switzerland
S. Cadeddu Sezione INFN di Cagliari, Cagliari, Italy
O. Callot LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
M. Calvi Sezione INFN di Milano Bicocca, Milano, Italy
M. Calvo Gomez Universitat de Barcelona, Barcelona, Spain
A. Camboni Universitat de Barcelona, Barcelona, Spain
P. Campana Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy European Organization for Nuclear Research (CERN), Geneva, Switzerland
D. Campora Perez European Organization for Nuclear Research (CERN), Geneva, Switzerland
A. Carbone Sezione INFN di Bologna, Bologna, Italy
G. Carboni Sezione INFN di Roma Tor Vergata, Roma, Italy
R. Cardinale Sezione INFN di Genova, Genova, Italy
A. Cardini Sezione INFN di Cagliari, Cagliari, Italy
H. Carranza-Mejia School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
L. Carson Imperial College London, London, United Kingdom
K. Carvalho Akiba Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
G. Casse Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
L. Castillo Garcia European Organization for Nuclear Research (CERN), Geneva, Switzerland
M. Cattaneo European Organization for Nuclear Research (CERN), Geneva, Switzerland
Ch. Cauet Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
M. Charles Department of Physics, University of Oxford, Oxford, United Kingdom
Ph. Charpentier European Organization for Nuclear Research (CERN), Geneva, Switzerland
P. Chen Center for High Energy Physics, Tsinghua University, Beijing, China Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
N. Chiapolini Physik-Institut, Universität Zürich, Zürich, Switzerland
M. Chrzaszcz Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
K. Ciba European Organization for Nuclear Research (CERN), Geneva, Switzerland
X. Cid Vidal European Organization for Nuclear Research (CERN), Geneva, Switzerland
G. Ciezarek Imperial College London, London, United Kingdom
P. E. L. Clarke School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
M. Clemencic European Organization for Nuclear Research (CERN), Geneva, Switzerland
H. V. Cliff Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
J. Closier European Organization for Nuclear Research (CERN), Geneva, Switzerland
C. Coca Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
V. Coco Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
J. Cogan CNRS/IN2P3, CPPM, Aix-Marseille Université, Marseille, France
E. Cogneras CNRS/IN2P3, LPC, Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
P. Collins European Organization for Nuclear Research (CERN), Geneva, Switzerland
A. Comerma-Montells Universitat de Barcelona, Barcelona, Spain
A. Contu Sezione INFN di Cagliari, Cagliari, Italy
A. Cook H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
M. Coombes H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
S. Coquereau LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France
G. Corti European Organization for Nuclear Research (CERN), Geneva, Switzerland
B. Couturier European Organization for Nuclear Research (CERN), Geneva, Switzerland
G. A. Cowan School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
D. C. Craik Department of Physics, University of Warwick, Coventry, United Kingdom
S. Cunliffe Imperial College London, London, United Kingdom
R. Currie School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
C. D’Ambrosio European Organization for Nuclear Research (CERN), Geneva, Switzerland
P. David LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France
P. N. Y. David Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
A. Davis University of Cincinnati, Cincinnati, OH United States
I. De Bonis LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France
K. De Bruyn Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
S. De Capua School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
M. De Cian Physik-Institut, Universität Zürich, Zürich, Switzerland
J. M. De Miranda Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil
L. De Paula Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
W. De Silva University of Cincinnati, Cincinnati, OH United States
P. De Simone Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy
D. Decamp LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France
M. Deckenhoff Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
L. Del Buono LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France
D. Derkach Sezione INFN di Bologna, Bologna, Italy
O. Deschamps CNRS/IN2P3, LPC, Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
F. Dettori Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands
A. Di Canto Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
H. Dijkstra European Organization for Nuclear Research (CERN), Geneva, Switzerland
M. Dogaru Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
S. Donleavy Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
F. Dordei Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
A. Dosil Suárez Universidad de Santiago de Compostela, Santiago de Compostela, Spain
D. Dossett Department of Physics, University of Warwick, Coventry, United Kingdom
A. Dovbnya NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine
F. Dupertuis Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
R. Dzhelyadin Institute for High Energy Physics (IHEP), Protvino, Russia
A. Dziurda Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
A. Dzyuba Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia
S. Easo European Organization for Nuclear Research (CERN), Geneva, Switzerland STFC Rutherford Appleton Laboratory, Didcot, United Kingdom
U. Egede Imperial College London, London, United Kingdom
V. Egorychev Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
S. Eidelman Budker Institute of Nuclear Physics (SB RAS) and Novosibirsk State University, Novosibirsk, Russia
D. van Eijk Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
S. Eisenhardt School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
U. Eitschberger Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
R. Ekelhof Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
L. Eklund European Organization for Nuclear Research (CERN), Geneva, Switzerland School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
I. El Rifai CNRS/IN2P3, LPC, Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
Ch. Elsasser Physik-Institut, Universität Zürich, Zürich, Switzerland
D. Elsby University of Birmingham, Birmingham, United Kingdom
A. Falabella Sezione INFN di Bologna, Bologna, Italy
C. Färber Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
G. Fardell School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
C. Farinelli Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
S. Farry School of Physics, University College Dublin, Dublin, Ireland
V. Fave Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
D. Ferguson School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
V. Fernandez Albor Universidad de Santiago de Compostela, Santiago de Compostela, Spain
F. Ferreira Rodrigues Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil
M. Ferro-Luzzi European Organization for Nuclear Research (CERN), Geneva, Switzerland
S. Filippov Institute for Nuclear Research of the Russian Academy of Sciences (INR RAN), Moscow, Russia
M. Fiore Sezione INFN di Ferrara, Ferrara, Italy
C. Fitzpatrick European Organization for Nuclear Research (CERN), Geneva, Switzerland
M. Fontana Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
F. Fontanelli Sezione INFN di Genova, Genova, Italy
R. Forty European Organization for Nuclear Research (CERN), Geneva, Switzerland
O. Francisco Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
M. Frank European Organization for Nuclear Research (CERN), Geneva, Switzerland
C. Frei European Organization for Nuclear Research (CERN), Geneva, Switzerland
M. Frosini Sezione INFN di Firenze, Firenze, Italy
S. Furcas Sezione INFN di Milano Bicocca, Milano, Italy
E. Furfaro Sezione INFN di Roma Tor Vergata, Roma, Italy
A. Gallas Torreira Universidad de Santiago de Compostela, Santiago de Compostela, Spain
D. Galli Sezione INFN di Bologna, Bologna, Italy
M. Gandelman Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
P. Gandini Syracuse University, Syracuse, NY United States
Y. Gao Center for High Energy Physics, Tsinghua University, Beijing, China
J. Garofoli Syracuse University, Syracuse, NY United States
P. Garosi School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
J. Garra Tico Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
L. Garrido Universitat de Barcelona, Barcelona, Spain
C. Gaspar European Organization for Nuclear Research (CERN), Geneva, Switzerland
R. Gauld Department of Physics, University of Oxford, Oxford, United Kingdom
E. Gersabeck Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
M. Gersabeck School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
T. Gershon European Organization for Nuclear Research (CERN), Geneva, Switzerland Department of Physics, University of Warwick, Coventry, United Kingdom
Ph. Ghez LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France
V. Gibson Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
V. V. Gligorov European Organization for Nuclear Research (CERN), Geneva, Switzerland
C. Göbel Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil
D. Golubkov Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
A. Golutvin Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia European Organization for Nuclear Research (CERN), Geneva, Switzerland Imperial College London, London, United Kingdom
A. Gomes Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
H. Gordon Department of Physics, University of Oxford, Oxford, United Kingdom
C. Gotti Sezione INFN di Milano Bicocca, Milano, Italy
M. Grabalosa Gándara CNRS/IN2P3, LPC, Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
R. Graciani Diaz Universitat de Barcelona, Barcelona, Spain
L. A. Granado Cardoso European Organization for Nuclear Research (CERN), Geneva, Switzerland
E. Graugés Universitat de Barcelona, Barcelona, Spain
G. Graziani Sezione INFN di Firenze, Firenze, Italy
A. Grecu Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
E. Greening Department of Physics, University of Oxford, Oxford, United Kingdom
S. Gregson Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
O. Grünberg Institut für Physik, Universität Rostock, Rostock, Germany
B. Gui Syracuse University, Syracuse, NY United States
E. Gushchin Institute for Nuclear Research of the Russian Academy of Sciences (INR RAN), Moscow, Russia
Yu. Guz Institute for High Energy Physics (IHEP), Protvino, Russia European Organization for Nuclear Research (CERN), Geneva, Switzerland
T. Gys European Organization for Nuclear Research (CERN), Geneva, Switzerland
C. Hadjivasiliou Syracuse University, Syracuse, NY United States
G. Haefeli Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
C. Haen European Organization for Nuclear Research (CERN), Geneva, Switzerland
S. C. Haines Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
S. Hall Imperial College London, London, United Kingdom
T. Hampson H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
S. Hansmann-Menzemer Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
N. Harnew Department of Physics, University of Oxford, Oxford, United Kingdom
S. T. Harnew H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
J. Harrison School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
T. Hartmann Institut für Physik, Universität Rostock, Rostock, Germany
J. He European Organization for Nuclear Research (CERN), Geneva, Switzerland
V. Heijne Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
K. Hennessy Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
P. Henrard CNRS/IN2P3, LPC, Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
J. A. Hernando Morata Universidad de Santiago de Compostela, Santiago de Compostela, Spain
E. van Herwijnen European Organization for Nuclear Research (CERN), Geneva, Switzerland
A. Hicheur Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil
E. Hicks Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
D. Hill Department of Physics, University of Oxford, Oxford, United Kingdom
M. Hoballah CNRS/IN2P3, LPC, Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
C. Hombach School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
P. Hopchev LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France
W. Hulsbergen Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
P. Hunt Department of Physics, University of Oxford, Oxford, United Kingdom
T. Huse Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
N. Hussain Department of Physics, University of Oxford, Oxford, United Kingdom
D. Hutchcroft Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
D. Hynds School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
V. Iakovenko Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine
M. Idzik Faculty of Physics and Applied Computer Science, AGH - University of Science and Technology, Kraków, Poland
P. Ilten School of Physics, University College Dublin, Dublin, Ireland
R. Jacobsson European Organization for Nuclear Research (CERN), Geneva, Switzerland
A. Jaeger Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
E. Jans Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
P. Jaton Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
F. Jing Center for High Energy Physics, Tsinghua University, Beijing, China
M. John Department of Physics, University of Oxford, Oxford, United Kingdom
D. Johnson Department of Physics, University of Oxford, Oxford, United Kingdom
C. R. Jones Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
C. Joram European Organization for Nuclear Research (CERN), Geneva, Switzerland
B. Jost European Organization for Nuclear Research (CERN), Geneva, Switzerland
M. Kaballo Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
S. Kandybei NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine
M. Karacson European Organization for Nuclear Research (CERN), Geneva, Switzerland
T. M. Karbach European Organization for Nuclear Research (CERN), Geneva, Switzerland
I. R. Kenyon University of Birmingham, Birmingham, United Kingdom
U. Kerzel European Organization for Nuclear Research (CERN), Geneva, Switzerland
T. Ketel Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands
A. Keune Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
B. Khanji Sezione INFN di Milano Bicocca, Milano, Italy
O. Kochebina LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
I. Komarov Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
R. F. Koopman Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands
P. Koppenburg Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
M. Korolev Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia
A. Kozlinskiy Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
L. Kravchuk Institute for Nuclear Research of the Russian Academy of Sciences (INR RAN), Moscow, Russia
K. Kreplin Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
M. Kreps Department of Physics, University of Warwick, Coventry, United Kingdom
G. Krocker Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
P. Krokovny Budker Institute of Nuclear Physics (SB RAS) and Novosibirsk State University, Novosibirsk, Russia
F. Kruse Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
M. Kucharczyk Sezione INFN di Milano Bicocca, Milano, Italy Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
V. Kudryavtsev Budker Institute of Nuclear Physics (SB RAS) and Novosibirsk State University, Novosibirsk, Russia
T. Kvaratskheliya Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia European Organization for Nuclear Research (CERN), Geneva, Switzerland
V. N. La Thi Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
D. Lacarrere European Organization for Nuclear Research (CERN), Geneva, Switzerland
G. Lafferty School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
A. Lai Sezione INFN di Cagliari, Cagliari, Italy
D. Lambert School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
R. W. Lambert Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands
E. Lanciotti European Organization for Nuclear Research (CERN), Geneva, Switzerland
G. Lanfranchi Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy European Organization for Nuclear Research (CERN), Geneva, Switzerland
C. Langenbruch European Organization for Nuclear Research (CERN), Geneva, Switzerland
T. Latham Department of Physics, University of Warwick, Coventry, United Kingdom
C. Lazzeroni University of Birmingham, Birmingham, United Kingdom
R. Le Gac CNRS/IN2P3, CPPM, Aix-Marseille Université, Marseille, France
J. van Leerdam Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
J.-P. Lees LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France
R. Lefèvre CNRS/IN2P3, LPC, Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
A. Leflat Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia
J. Lefrançois LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
S. Leo Sezione INFN di Pisa, Pisa, Italy
O. Leroy CNRS/IN2P3, CPPM, Aix-Marseille Université, Marseille, France
T. Lesiak Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
B. Leverington Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
Y. Li Center for High Energy Physics, Tsinghua University, Beijing, China
L. Li Gioi CNRS/IN2P3, LPC, Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
M. Liles Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
R. Lindner European Organization for Nuclear Research (CERN), Geneva, Switzerland
C. Linn Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
B. Liu Center for High Energy Physics, Tsinghua University, Beijing, China
G. Liu European Organization for Nuclear Research (CERN), Geneva, Switzerland
S. Lohn European Organization for Nuclear Research (CERN), Geneva, Switzerland
I. Longstaff School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
J. H. Lopes Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
E. Lopez Asamar Universitat de Barcelona, Barcelona, Spain
N. Lopez-March Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
H. Lu Center for High Energy Physics, Tsinghua University, Beijing, China
D. Lucchesi Sezione INFN di Padova, Padova, Italy
J. Luisier Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
H. Luo School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
F. Machefert LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
I. V. Machikhiliyan LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
F. Maciuc Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
O. Maev Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia European Organization for Nuclear Research (CERN), Geneva, Switzerland
S. Malde Department of Physics, University of Oxford, Oxford, United Kingdom
G. Manca Sezione INFN di Cagliari, Cagliari, Italy
G. Mancinelli CNRS/IN2P3, CPPM, Aix-Marseille Université, Marseille, France
U. Marconi Sezione INFN di Bologna, Bologna, Italy
R. Märki Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
J. Marks Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
G. Martellotti Sezione INFN di Roma La Sapienza, Roma, Italy
A. Martens LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France
A. Martín Sánchez LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
M. Martinelli Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
D. Martinez Santos Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands
D. Martins Tostes Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
A. Martynov Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia
A. Massafferri Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil
R. Matev European Organization for Nuclear Research (CERN), Geneva, Switzerland
Z. Mathe European Organization for Nuclear Research (CERN), Geneva, Switzerland
C. Matteuzzi Sezione INFN di Milano Bicocca, Milano, Italy
E. Maurice CNRS/IN2P3, CPPM, Aix-Marseille Université, Marseille, France
A. Mazurov Sezione INFN di Ferrara, Ferrara, Italy Institute for Nuclear Research of the Russian Academy of Sciences (INR RAN), Moscow, Russia European Organization for Nuclear Research (CERN), Geneva, Switzerland
J. McCarthy University of Birmingham, Birmingham, United Kingdom
A. McNab School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
R. McNulty School of Physics, University College Dublin, Dublin, Ireland
B. Meadows Department of Physics, University of Oxford, Oxford, United Kingdom University of Cincinnati, Cincinnati, OH United States
F. Meier Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
M. Meissner Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
M. Merk Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
D. A. Milanes LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France
M.-N. Minard LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France
J. Molina Rodriguez Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil
S. Monteil CNRS/IN2P3, LPC, Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
D. Moran School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
P. Morawski Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
M. J. Morello Sezione INFN di Pisa, Pisa, Italy
R. Mountain Syracuse University, Syracuse, NY United States
I. Mous Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
F. Muheim School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
K. Müller Physik-Institut, Universität Zürich, Zürich, Switzerland
R. Muresan Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
B. Muryn Faculty of Physics and Applied Computer Science, AGH - University of Science and Technology, Kraków, Poland
B. Muster Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
P. Naik H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
T. Nakada Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
R. Nandakumar STFC Rutherford Appleton Laboratory, Didcot, United Kingdom
I. Nasteva Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil
M. Needham School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
N. Neufeld European Organization for Nuclear Research (CERN), Geneva, Switzerland
A. D. Nguyen Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
T. D. Nguyen Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
C. Nguyen-Mau Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
M. Nicol LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
V. Niess CNRS/IN2P3, LPC, Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
R. Niet Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
N. Nikitin Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia
T. Nikodem Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
A. Nomerotski Department of Physics, University of Oxford, Oxford, United Kingdom
A. Novoselov Institute for High Energy Physics (IHEP), Protvino, Russia
A. Oblakowska-Mucha Faculty of Physics and Applied Computer Science, AGH - University of Science and Technology, Kraków, Poland
V. Obraztsov Institute for High Energy Physics (IHEP), Protvino, Russia
S. Oggero Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
S. Ogilvy School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
O. Okhrimenko Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine
R. Oldeman Sezione INFN di Cagliari, Cagliari, Italy
M. Orlandea Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
J. M. Otalora Goicochea Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
P. Owen Imperial College London, London, United Kingdom
A. Oyanguren Universitat de Barcelona, Barcelona, Spain
B. K. Pal Syracuse University, Syracuse, NY United States
A. Palano Sezione INFN di Bari, Bari, Italy
M. Palutan Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy
J. Panman European Organization for Nuclear Research (CERN), Geneva, Switzerland
A. Papanestis STFC Rutherford Appleton Laboratory, Didcot, United Kingdom
M. Pappagallo School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
C. Parkes School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
C. J. Parkinson Imperial College London, London, United Kingdom
G. Passaleva Sezione INFN di Firenze, Firenze, Italy
G. D. Patel Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
M. Patel Imperial College London, London, United Kingdom
G. N. Patrick STFC Rutherford Appleton Laboratory, Didcot, United Kingdom
C. Patrignani Sezione INFN di Genova, Genova, Italy
C. Pavel-Nicorescu Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
A. Pazos Alvarez Universidad de Santiago de Compostela, Santiago de Compostela, Spain
A. Pellegrino Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
G. Penso Sezione INFN di Roma La Sapienza, Roma, Italy
M. Pepe Altarelli European Organization for Nuclear Research (CERN), Geneva, Switzerland
S. Perazzini Sezione INFN di Bologna, Bologna, Italy
D. L. Perego Sezione INFN di Milano Bicocca, Milano, Italy
E. Perez Trigo Universidad de Santiago de Compostela, Santiago de Compostela, Spain
A. Pérez-Calero Yzquierdo Universitat de Barcelona, Barcelona, Spain
P. Perret CNRS/IN2P3, LPC, Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
M. Perrin-Terrin CNRS/IN2P3, CPPM, Aix-Marseille Université, Marseille, France
K. Petridis Imperial College London, London, United Kingdom
A. Petrolini Sezione INFN di Genova, Genova, Italy
A. Phan Syracuse University, Syracuse, NY United States
E. Picatoste Olloqui Universitat de Barcelona, Barcelona, Spain
B. Pietrzyk LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France
T. Pilař Department of Physics, University of Warwick, Coventry, United Kingdom
D. Pinci Sezione INFN di Roma La Sapienza, Roma, Italy
S. Playfer School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
M. Plo Casasus Universidad de Santiago de Compostela, Santiago de Compostela, Spain
F. Polci LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France
G. Polok Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
A. Poluektov Budker Institute of Nuclear Physics (SB RAS) and Novosibirsk State University, Novosibirsk, Russia Department of Physics, University of Warwick, Coventry, United Kingdom
E. Polycarpo Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
D. Popov Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
B. Popovici Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
C. Potterat Universitat de Barcelona, Barcelona, Spain
A. Powell Department of Physics, University of Oxford, Oxford, United Kingdom
J. Prisciandaro Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
A. Pritchard Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
C. Prouve LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
V. Pugatch Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine
A. Puig Navarro Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
G. Punzi Sezione INFN di Pisa, Pisa, Italy
W. Qian LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France
J. H. Rademacker H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
B. Rakotomiaramanana Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
M. S. Rangel Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
I. Raniuk NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine
N. Rauschmayr European Organization for Nuclear Research (CERN), Geneva, Switzerland
G. Raven Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands
S. Redford Department of Physics, University of Oxford, Oxford, United Kingdom
M. M. Reid Department of Physics, University of Warwick, Coventry, United Kingdom
A. C. dos Reis Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil
S. Ricciardi STFC Rutherford Appleton Laboratory, Didcot, United Kingdom
A. Richards Imperial College London, London, United Kingdom
K. Rinnert Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
V. Rives Molina Universitat de Barcelona, Barcelona, Spain
D. A. Roa Romero CNRS/IN2P3, LPC, Clermont Université, Université Blaise Pascal, Clermont-Ferrand, France
P. Robbe LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
E. Rodrigues School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
P. Rodriguez Perez Universidad de Santiago de Compostela, Santiago de Compostela, Spain
S. Roiser European Organization for Nuclear Research (CERN), Geneva, Switzerland
V. Romanovsky Institute for High Energy Physics (IHEP), Protvino, Russia
A. Romero Vidal Universidad de Santiago de Compostela, Santiago de Compostela, Spain
J. Rouvinet Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
T. Ruf European Organization for Nuclear Research (CERN), Geneva, Switzerland
F. Ruffini Sezione INFN di Pisa, Pisa, Italy
H. Ruiz Universitat de Barcelona, Barcelona, Spain
P. Ruiz Valls Universitat de Barcelona, Barcelona, Spain
G. Sabatino Sezione INFN di Roma La Sapienza, Roma, Italy
J. J. Saborido Silva Universidad de Santiago de Compostela, Santiago de Compostela, Spain
N. Sagidova Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia
P. Sail School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
B. Saitta Sezione INFN di Cagliari, Cagliari, Italy
C. Salzmann Physik-Institut, Universität Zürich, Zürich, Switzerland
B. Sanmartin Sedes Universidad de Santiago de Compostela, Santiago de Compostela, Spain
M. Sannino Sezione INFN di Genova, Genova, Italy
R. Santacesaria Sezione INFN di Roma La Sapienza, Roma, Italy
C. Santamarina Rios Universidad de Santiago de Compostela, Santiago de Compostela, Spain
E. Santovetti Sezione INFN di Roma Tor Vergata, Roma, Italy
M. Sapunov CNRS/IN2P3, CPPM, Aix-Marseille Université, Marseille, France
A. Sarti Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy
C. Satriano Sezione INFN di Roma La Sapienza, Roma, Italy
A. Satta Sezione INFN di Roma Tor Vergata, Roma, Italy
M. Savrie Sezione INFN di Ferrara, Ferrara, Italy
D. Savrina Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia
P. Schaack Imperial College London, London, United Kingdom
M. Schiller Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands
H. Schindler European Organization for Nuclear Research (CERN), Geneva, Switzerland
M. Schlupp Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
M. Schmelling Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
B. Schmidt European Organization for Nuclear Research (CERN), Geneva, Switzerland
O. Schneider Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
A. Schopper European Organization for Nuclear Research (CERN), Geneva, Switzerland
M.-H. Schune LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
R. Schwemmer European Organization for Nuclear Research (CERN), Geneva, Switzerland
B. Sciascia Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy
A. Sciubba Sezione INFN di Roma La Sapienza, Roma, Italy
M. Seco Universidad de Santiago de Compostela, Santiago de Compostela, Spain
A. Semennikov Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
K. Senderowska Faculty of Physics and Applied Computer Science, AGH - University of Science and Technology, Kraków, Poland
I. Sepp Imperial College London, London, United Kingdom
N. Serra Physik-Institut, Universität Zürich, Zürich, Switzerland
J. Serrano CNRS/IN2P3, CPPM, Aix-Marseille Université, Marseille, France
P. Seyfert Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
M. Shapkin Institute for High Energy Physics (IHEP), Protvino, Russia
I. Shapoval Sezione INFN di Ferrara, Ferrara, Italy NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine
P. Shatalov Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
Y. Shcheglov Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia
T. Shears European Organization for Nuclear Research (CERN), Geneva, Switzerland Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
L. Shekhtman Budker Institute of Nuclear Physics (SB RAS) and Novosibirsk State University, Novosibirsk, Russia
O. Shevchenko NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine
V. Shevchenko Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
A. Shires Imperial College London, London, United Kingdom
R. Silva Coutinho Department of Physics, University of Warwick, Coventry, United Kingdom
T. Skwarnicki Syracuse University, Syracuse, NY United States
N. A. Smith Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
E. Smith STFC Rutherford Appleton Laboratory, Didcot, United Kingdom Department of Physics, University of Oxford, Oxford, United Kingdom
M. Smith School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
M. D. Sokoloff University of Cincinnati, Cincinnati, OH United States
F. J. P. Soler School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
F. Soomro Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy
D. Souza H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
B. Souza De Paula Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
B. Spaan Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
A. Sparkes School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
P. Spradlin School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
F. Stagni European Organization for Nuclear Research (CERN), Geneva, Switzerland
S. Stahl Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
O. Steinkamp Physik-Institut, Universität Zürich, Zürich, Switzerland
S. Stoica Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
S. Stone Syracuse University, Syracuse, NY United States
B. Storaci Physik-Institut, Universität Zürich, Zürich, Switzerland
M. Straticiuc Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
U. Straumann Physik-Institut, Universität Zürich, Zürich, Switzerland
V. K. Subbiah European Organization for Nuclear Research (CERN), Geneva, Switzerland
S. Swientek Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
V. Syropoulos Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands
M. Szczekowski National Center for Nuclear Research (NCBJ), Warsaw, Poland
P. Szczypka European Organization for Nuclear Research (CERN), Geneva, Switzerland Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
T. Szumlak Faculty of Physics and Applied Computer Science, AGH - University of Science and Technology, Kraków, Poland
S. T’Jampens LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France
M. Teklishyn LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
E. Teodorescu Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
F. Teubert European Organization for Nuclear Research (CERN), Geneva, Switzerland
C. Thomas Department of Physics, University of Oxford, Oxford, United Kingdom
E. Thomas European Organization for Nuclear Research (CERN), Geneva, Switzerland
J. van Tilburg Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
V. Tisserand LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France
M. Tobin Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
S. Tolk Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands
D. Tonelli European Organization for Nuclear Research (CERN), Geneva, Switzerland
S. Topp-Joergensen Department of Physics, University of Oxford, Oxford, United Kingdom
N. Torr Department of Physics, University of Oxford, Oxford, United Kingdom
E. Tournefier LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France Imperial College London, London, United Kingdom
S. Tourneur Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
M. T. Tran Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
M. Tresch Physik-Institut, Universität Zürich, Zürich, Switzerland
A. Tsaregorodtsev CNRS/IN2P3, CPPM, Aix-Marseille Université, Marseille, France
P. Tsopelas Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
N. Tuning Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
M. Ubeda Garcia European Organization for Nuclear Research (CERN), Geneva, Switzerland
A. Ukleja National Center for Nuclear Research (NCBJ), Warsaw, Poland
D. Urner School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
U. Uwer Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
V. Vagnoni Sezione INFN di Bologna, Bologna, Italy
G. Valenti Sezione INFN di Bologna, Bologna, Italy
R. Vazquez Gomez Universitat de Barcelona, Barcelona, Spain
P. Vazquez Regueiro Universidad de Santiago de Compostela, Santiago de Compostela, Spain
S. Vecchi Sezione INFN di Ferrara, Ferrara, Italy
J. J. Velthuis H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
M. Veltri Sezione INFN di Firenze, Firenze, Italy
G. Veneziano Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
M. Vesterinen European Organization for Nuclear Research (CERN), Geneva, Switzerland
B. Viaud LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France
D. Vieira Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
X. Vilasis-Cardona Universitat de Barcelona, Barcelona, Spain
A. Vollhardt Physik-Institut, Universität Zürich, Zürich, Switzerland
D. Volyanskyy Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
D. Voong H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
A. Vorobyev Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia
V. Vorobyev Budker Institute of Nuclear Physics (SB RAS) and Novosibirsk State University, Novosibirsk, Russia
C. Voß Institut für Physik, Universität Rostock, Rostock, Germany
H. Voss Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
R. Waldi Institut für Physik, Universität Rostock, Rostock, Germany
R. Wallace School of Physics, University College Dublin, Dublin, Ireland
S. Wandernoth Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
J. Wang Syracuse University, Syracuse, NY United States
D. R. Ward Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
N. K. Watson University of Birmingham, Birmingham, United Kingdom
A. D. Webber School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
D. Websdale Imperial College London, London, United Kingdom
M. Whitehead Department of Physics, University of Warwick, Coventry, United Kingdom
J. Wicht European Organization for Nuclear Research (CERN), Geneva, Switzerland
J. Wiechczynski Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
D. Wiedner Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
L. Wiggers Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
G. Wilkinson Department of Physics, University of Oxford, Oxford, United Kingdom
M. P. Williams Department of Physics, University of Warwick, Coventry, United Kingdom STFC Rutherford Appleton Laboratory, Didcot, United Kingdom
M. Williams Massachusetts Institute of Technology, Cambridge, MA United States
F. F. Wilson STFC Rutherford Appleton Laboratory, Didcot, United Kingdom
J. Wishahi Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
M. Witek Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
S. A. Wotton Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
S. Wright Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
S. Wu Center for High Energy Physics, Tsinghua University, Beijing, China
K. Wyllie European Organization for Nuclear Research (CERN), Geneva, Switzerland
Y. Xie European Organization for Nuclear Research (CERN), Geneva, Switzerland School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
Z. Xing Syracuse University, Syracuse, NY United States
Z. Yang Center for High Energy Physics, Tsinghua University, Beijing, China
R. Young School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
X. Yuan Center for High Energy Physics, Tsinghua University, Beijing, China
O. Yushchenko Institute for High Energy Physics (IHEP), Protvino, Russia
M. Zangoli Sezione INFN di Bologna, Bologna, Italy
M. Zavertyaev Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
F. Zhang Center for High Energy Physics, Tsinghua University, Beijing, China
L. Zhang Syracuse University, Syracuse, NY United States
W. C. Zhang School of Physics, University College Dublin, Dublin, Ireland
Y. Zhang Center for High Energy Physics, Tsinghua University, Beijing, China
A. Zhelezov Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
A. Zhokhov Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
L. Zhong Center for High Energy Physics, Tsinghua University, Beijing, China
A. Zvyagin European Organization for Nuclear Research (CERN), Geneva, Switzerland

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Measurement of form-factor-independent observables in the decay B0→K(*0)μ(+)μ(-)

We present a measurement of form-factor-independent angular observables in the decay B(0)→K*(892)(0)μ(+)μ(-). The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb(-1), collected by the LHCb experiment in pp collisions at a center-of-mass energy of 7 TeV. Four observables are measured in six bins of the dimuon invariant mass squared q² in the range 0.1<q²<19.0 GeV²/c(4). Agreement with recent theoretical predictions of the standard model is found for 23 of the 24 measurements. A local discrepancy, corresponding to 3.7 Gaussian standard deviations is observed in one q² bin for one of the observables. Considering the 24 measurements as independent, the probability to observe such a discrepancy, or larger, in one is 0.5%.

Measurement of the CP asymmetry in B(+)→K(+)μ(+)μ(-) decays

A measurement of the CP asymmetry in B(+)→K(+)μ(+)μ(-) decays is presented using pp collision data, corresponding to an integrated luminosity of 1.0 fb(-1), recorded by the LHCb experiment during 2011 at a center-of-mass energy of 7 TeV. The measurement is performed in seven bins of μ(+)μ(-) invariant mass squared in the range 0.05<q2<22.00 GeV2/c4, excluding the J/ψ and ψ(2S) resonance regions. Production and detection asymmetries are corrected for using the B(+)→J/ψK(+) decay as a control mode. Averaged over all the bins, the CP asymmetry is found to be A(CP)=0.000±0.033 (stat)±0.005 (syst)±0.007 (J/ψK), where the third uncertainty is due to the CP asymmetry of the control mode. This is consistent with the standard model prediction.

Search for the lepton-flavor-violating decays B(s)0→e(±)μ(∓) and B0→e(±)μ(∓)

A search for the lepton-flavor-violating decays B(s)0→e(±)μ(∓) and B0→e(±)μ(∓) is performed with a data sample, corresponding to an integrated luminosity of 1.0 fb(-1) of pp collisions at √s=7 TeV, collected by the LHCb experiment. The observed number of B(s)0→e(±)μ(∓) and B0→e(±)μ(∓) candidates is consistent with background expectations. Upper limits on the branching fractions of both decays are determined to be B(B(s)0→e(±)μ(∓))<1.1(1.4)×10(-8) and B(B0→e(±)μ(∓))<2.8(3.7)×10(-9) at 90% (95%) confidence level (C.L.). These limits are a factor of 20 lower than those set by previous experiments. Lower bounds on the Pati-Salam leptoquark masses are also calculated, M(LQ)(B(s)0→e(±)μ(∓))>101 TeV/c(2) and M(LQ)(B0→e(±)μ(∓))>126 TeV/c(2) at 95% C.L., and are a factor of 2 higher than the previous bounds.

Observation of a resonance in B+ → K+ μ+ μ- decays at low recoil

A broad peaking structure is observed in the dimuon spectrum of B+ → K+ μ+ μ- decays in the kinematic region where the kaon has a low recoil against the dimuon system. The structure is consistent with interference between the B+ → K+ μ+ μ- decay and a resonance and has a statistical significance exceeding six standard deviations. The mean and width of the resonance are measured to be 4191(-8)(+9)  MeV/c2 and 65(-16)(+22)  MeV/c2, respectively, where the uncertainties include statistical and systematic contributions. These measurements are compatible with the properties of the ψ(4160) meson. First observations of both the decay B+ → ψ(4160)K+ and the subsequent decay ψ(4160) → μ+ μ- are reported. The resonant decay and the interference contribution make up 20% of the yield for dimuon masses above 3770  MeV/c2. This contribution is larger than theoretical estimates.

Precision measurement of the Λb(0) baryon lifetime

The ratio of the Λb(0) baryon lifetime to that of the B(0) meson is measured using 1.0  fb(-1) of integrated luminosity in 7 TeV center-of-mass energy pp collisions at the LHC. The Λb(0) baryon is observed for the first time in the decay mode Λb(0)→J/ψpK-, while the B(0) meson decay used is the well known B(0)→J/ψπ+ K- mode, where the π+ K- mass is consistent with that of the K(*0)(892) meson. The ratio of lifetimes is measured to be 0.976±0.012±0.006, in agreement with theoretical expectations based on the heavy quark expansion. Using previous determinations of the B(0) meson lifetime, the Λb(0) lifetime is found to be 1.482±0.018±0.012  ps. In both cases, the first uncertainty is statistical and the second systematic.

Measurement of CP violation in the phase space of B±→K± π+ π- and B±→K± K+ K- decays

The charmless decays B±→K± π+ π- and B±→K± K+ K- are reconstructed using data, corresponding to an integrated luminosity of 1.0  fb(-1), collected by LHCb in 2011. The inclusive charge asymmetries of these modes are measured as ACP(B±→K± π+ π-)=0.032±0.008 (stat)±0.004 (syst)±0.007(J/ψK±) and ACP(B±→K± K+ K-)=-0.043±0.009 (stat)±0.003 (syst)±0.007(J/ψK±), where the third uncertainty is due to the CP asymmetry of the B±→J/ψK± reference mode. The significance of ACP(B±→K± K+ K-) exceeds three standard deviations and is the first evidence of an inclusive CP asymmetry in charmless three-body B decays. In addition to the inclusive CP asymmetries, larger asymmetries are observed in localized regions of phase space.

First measurement of the CP-violating phase in Bs(0) → ϕϕ decays

A first flavor-tagged measurement of the time-dependent CP-violating asymmetry in B(s)(0) → ϕϕ decays is presented. In this decay channel, the CP-violating weak phase arises due to CP violation in the interference between B(s)(0)-B(s)(0) mixing and the b → sss gluonic penguin decay amplitude. Using a sample of pp collision data corresponding to an integrated luminosity of 1.0 fb(-1) and collected at a center-of-mass energy of 7 TeV with the LHCb detector, 880 B(s)(0) → ϕϕ signal decays are obtained. The CP-violating phase is measured to be in the interval [-2.46,-0.76] rad at a 68% confidence level. The p value of the standard model prediction is 16%.

Measurements of the branching fractions of [Formula: see text] decays

The branching fractions of the decay [Formula: see text] for different intermediate states are measured using data, corresponding to an integrated luminosity of 1.0 fb^-1, collected by the LHCb experiment. The total branching fraction, its charmless component [Formula: see text] and the branching fractions via the resonant [Formula: see text] states η_c (1S) and ψ(2S) relative to the decay via a J/ψ intermediate state are [Formula: see text] Upper limits on the B⁺ branching fractions into the η_c (2S) meson and into the charmonium-like states X(3872) and X(3915) are also obtained.

First observation of CP violation in the decays of B(s)0 mesons

Using pp collision data corresponding to an integrated luminosity of 1.0 fb(-1) and collected by LHCb in 2011 at a center-of-mass energy of 7 TeV, we report the measurement of direct CP violation in B(s)(0)→K(-)π(+) decays, A(CP)(B(s)(0)→K(-)π(+)=0.27±0.04 (stat)±0.01 (syst), with significance exceeding 5 standard deviations. This is the first observation of CP violation in the decays of B(s)(0) mesons. Furthermore, we provide an improved determination of direct CP violation in B(0)→K(+)π(-) decays, A(CP)(B(0)→K(+)π(-)=-0.080±0.007 (stat)±0.003 (syst), which is the most precise measurement of this quantity to date.

Determination of the X(3872) meson quantum numbers

The quantum numbers of the X(3872) meson are determined to be J(PC)=1(++) based on angular correlations in B(+)→X(3872)K(+) decays, where X(3872)→π(+)π(-)J/ψ and J/ψ→μ(+)μ(-). The data correspond to 1.0 fb(-1) of pp collisions collected by the LHCb detector. The only alternative assignment allowed by previous measurements J(PC)=2(-+) is rejected with a confidence level equivalent to more than 8 Gaussian standard deviations using a likelihood-ratio test in the full angular phase space. This result favors exotic explanations of the X(3872) state.

Search for rare B(0)((s))→μ(+)μ(-)μ(+)μ(-) decays

A search for the decays B(0)((s))→μ(+)μ(-)μ(+)μ(-) and B(0)→μ(+)μ(-)μ(+)μ(-) is performed using data, corresponding to an integrated luminosity of 1.0 fb(-1), collected with the LHCb detector in 2011. The number of candidates observed is consistent with the expected background and, assuming phase-space models of the decays, limits on the branching fractions are set: B(B(s)(0)→μ(+)μ(-)μ(+)μ(-))<1.6(1.2)×10(-8) and B(B(0)→μ(+)μ(-)μ(+)μ(-))<6.6(5.3)×10(-9) at 95% (90%) confidence level. In addition, limits are set in the context of a supersymmetric model which allows for the B((s))(0) meson to decay into a scalar (S) and pseudoscalar particle (P), where S and P have masses of 2.5 GeV/c and 214.3 MeV/c, respectively, both resonances decay into μ(+)μ(-). The branching fraction limits for these decays are B(B(s)(0)→SP)<1.6(1.2)×10(-8) and B(B(0)→SP)<6.3(5.1)×10(-9) at 95% (90%) confidence level.

Measurement of the forward energy flow in pp collisions at [Formula: see text]

The energy flow created in pp collisions at [Formula: see text] is studied within the pseudorapidity range 1.9<η<4.9 with data collected by the LHCb experiment. The measurements are performed for inclusive minimum-bias interactions, hard scattering processes and events with an enhanced or suppressed diffractive contribution. The results are compared to predictions given by Pythia-based and cosmic-ray event generators, which provide different models of soft hadronic interactions.

Measurement of the Λ(b)(0), Ξ (b)(-), and Ω(b((-) Baryon masses

Bottom baryons decaying to a J/ψ meson and a hyperon are reconstructed using 1.0 fb(-1) of data collected in 2011 with the LHCb detector. Significant Λ(b)(0) → J/ψΛ, Ξ(b((-) → J/ψΞ(-) and Ω(b)(-) → J/ψΩ(-) signals are observed and the corresponding masses are measured to be M(Λ(b)(0))=5619.53 ± 0.13(stat.) ± 0.45(syst.) MeV/c(2), M(Ξ(b)(-)) = 5795.8 ± 0.9(stat.) ± 0.4(syst.) MeV/c(2), M(Ω(b)(-)) = 6046.0 ± 2.2(stat.) ± 0.5(syst.) MeV/c(2) , while the differences with respect to the Λ(b)(0) mass are M(Ξ(b)(-))-M(Λ(b)(0))=176.2 ± 0.9(stat.) ± 0.1(syst.) MeV/c(2), M(Ω(b)(-))-M(Λ(b)(0))=426.4 ± 2.2(stat.) ± 0.4(syst.) MeV/c(2). These are the most precise mass measurements of the Λ(b)(0), Ξ(b)(-) and Ω(b)(-) baryons to date. Averaging the above Λ(b)(0) mass measurement with that published by LHCb using 35 pb(-1) of data collected in 2010 yields M(Λ(b)(0)) = 5619.44 ± 0.13(stat.)± 0.38(syst.) MeV/c(2).

First observation of the decay Bs2*(5840)(0)→B*+ K- and studies of excited Bs(0) mesons

The properties of the orbitally excited (L=1) Bs(0) states are studied by using 1.0  fb(-1) of pp collisions at sqrt[s]=7  TeV collected with the LHCb detector. The first observation of the Bs2*(5840)(0) meson decaying to B*+ K- is reported, and the corresponding branching fraction measured relative to the B+ K- decay mode. The Bs1(5830)(0)→B*+ K- decay is observed as well. The width of the Bs2*(5840)(0) state is measured for the first time, and the masses of the two states are determined with the highest precision to date. The observation of the Bs2*(5840)(0)→B*+ K- decay favors the spin-parity assignment J(P)=2+ for the Bs2*(5840)(0) meson. In addition, the most precise measurement of the mass difference m(B*+)-m(B+)=45.01±0.30(stat)±0.23(syst)  MeV/c(2) is obtained.

Observation of D0-D0 oscillations

We report a measurement of the time-dependent ratio of D(0) → K(+) π- to D(0) → K(-) π(+) decay rates in D(*+)-tagged events using 1.0 fb(-1) of integrated luminosity recorded by the LHCb experiment. We measure the mixing parameters x('2) = (-0.9 ± 1.3) × 10(-4), y' = (7.2 ± 2.4) × 10(-3), and the ratio of doubly-Cabibbo-suppressed to Cabibbo-favored decay rates R(D) = (3.52 ± 0.15) × 10^{-3}, where the uncertainties include statistical and systematic sources. The result excludes the no-mixing hypothesis with a probability corresponding to 9.1 standard deviations and represents the first observation of D0-D0 oscillations from a single measurement.

Measurement of the CP asymmetry in B(0)→K(*0)μ(+)μ(-) decays

A measurement of the CP asymmetry in B(0)→K(*0)μ(+)μ(-) decays is presented, based on 1.0 fb(-1) of pp collision data recorded by the LHCb experiment during 2011. The measurement is performed in six bins of invariant mass squared of the μ(+)μ(-) pair, excluding the J/ψ and ψ(2S) resonance regions. Production and detection asymmetries are removed using the B(0)→J/ψK(*0) decay as a control mode. The integrated CP asymmetry is found to be -0.072±0.040(stat)±0.005(syst), consistent with the standard model.

First evidence for the decay B(s)(0)→μ+ μ-

A search for the rare decays B(s)(0)→μ+ μ- and B(0)→μ+ μ- is performed with data collected in 2011 and 2012 with the LHCb experiment at the Large Hadron Collider. The data samples comprise 1.1  fb(-1) of proton-proton collisions at sqrt[s]=8  TeV and 1.0  fb(-1) at sqrt[s]=7  TeV. We observe an excess of B(s)(0)→μ+ μ- candidates with respect to the background expectation. The probability that the background could produce such an excess or larger is 5.3×10(-4) corresponding to a signal significance of 3.5 standard deviations. A maximum-likelihood fit gives a branching fraction of B(B(s)(0)→μ+ μ-)=(3.2(-1.2)(+1.5))×10(-9), where the statistical uncertainty is 95% of the total uncertainty. This result is in agreement with the standard model expectation. The observed number of B(0)→μ+ μ- candidates is consistent with the background expectation, giving an upper limit of B(B(0)→μ+ μ-)<9.4×10(-10) at 95% confidence level.

Measurements of B(c)+ production and mass with the B(c)+ → J/ψπ+ decay

Measurements of B(c)(+) production and mass are performed with the decay mode B(c)(+)→J/ψπ(+) using 0.37 fb(-1) of data collected in pp collisions at √[s]=7 TeV by the LHCb experiment. The ratio of the production cross section times branching fraction between the B(c)(+)→J/ψπ(+) and the B(+)→J/ψK(+) decays is measured to be (0.68±0.10(stat)±0.03(syst)±0.05(lifetime))% for B(c)(+) and B(+) mesons with transverse momenta p(T)>4 GeV/c and pseudorapidities 2.5<η<4.5. The B(c)(+) mass is directly measured to be 6273.7±1.3(stat)±1.6(syst) MeV/c(2), and the measured mass difference with respect to the B(+) meson is M(B(c)(+))-M(B(+))=994.6±1.3(stat)±0.6(syst) MeV/c(2).

Near-GeV acceleration of electrons by a nonlinear plasma wave driven by a self-guided laser pulse

The acceleration of electrons to approximately 0.8 GeV has been observed in a self-injecting laser wakefield accelerator driven at a plasma density of 5.5x10(18) cm(-3) by a 10 J, 55 fs, 800 nm laser pulse in the blowout regime. The laser pulse is found to be self-guided for 1 cm (>10zR), by measurement of a single filament containing >30% of the initial laser energy at this distance. Three-dimensional particle in cell simulations show that the intensity within the guided filament is amplified beyond its initial focused value to a normalized vector potential of a0>6, thus driving a highly nonlinear plasma wave.

Search for Lorentz and CPT violation effects in Muon spin precession

The spin precession frequency of muons stored in the (g-2) storage ring has been analyzed for evidence of Lorentz and CPT violation. Two Lorentz and CPT violation signatures were searched for a nonzero delta omega a(=omega a mu+ - omega a mu-) and a sidereal variation of omega a mu+/-). No significant effect is found, and the following limits on the standard-model extension parameters are obtained: bZ = -(1.0+/-1.1) x 10(-23) GeV; (m mu dZ0 + HXY)=(1.8+/-6.0) x 10(-23) GeV; and the 95% confidence level limits b perpendicular mu+ <1.4 x 10(-24) GeV and b perpendicular mu- <2.6 x 10(-24) GeV.

Observation of Psi(3770)-->gammachi(c1)-->gammagammaJ/Psi

From e(+)e(-) collision data acquired with the CLEO detector at the Cornell Electron Storage Ring, we observe the non-DD(_) decay Psi(3770))-->gammachi(c1) with a statistical significance of 6.6 standard deviations, using the two-photon cascades to J/Psi and J/Psi-->l(+)l(-). We determine sigma(e(=)e(-)-->Psi(3770))xBeta(Psi(3770)-->gammachi(c1))=(18.0 +/- 3.3 +/- 2.5) pb and branching fraction Beta(Psi(3770)-->gammachi(c1)=(2.8 +/- 0.5+/-0.4) x 10(-3). We set 90% C.L. upper limits for the transition to chi(c2) (chi(c0)): sigma x Beta<5.7 pb (<282 pb) and Beta<0.9 x 10(-3) (<44 x 10(-3)). We also determine Gamma(Psi(3770)gammachi(c1))/Gamma(Psi(3770)-->pi(+)pi(-)J/Psi)=1.5 +/- 0.3 +/- 0.3 (>1.0 at 90% C.L.), which bears upon the interpretation of X(3872).

Observation of psi(3770) --> pi pi J/psi and measurement of Gamma ee[psi(2S)]

We observe signals for the decays psi(3770) --> XJ/psi from data acquired with the CLEO detector operating at the CESR e+ e- collider with square root of s = 3773 MeV. We measure the following branching fractions Beta(psi(3770) --> XJ/psi and significances: (189 +/- 20 +/- 20) x 10(-5) (11.6sigma) for X = pi+ pi-, (80 +/- 25 +/- 16) x 10(-5) (3.4sigma) for X = pi0 pi0, and (87 +/- 33 +/- 22) x 10(-5) (3.5sigma) for X = eta, where the errors are statistical and systematic, respectively. The radiative return process e+ e- --> gamma psi(2S) populates the same event sample and is used to measure Gamma ee[psi(2S)] = (2.54 +/- 0.03 +/- 0.11) keV.

Search for exclusive multibody non- decays at the resonance

Using data collected at the psi(3770) resonance with the CLEO-c detector at the Cornell e+e- storage ring, we present searches for 25 charmless decay modes of the psi(3770), mostly multibody final states. No evidence for charmless decays is found.

Observation of Bs production at the Y(5S) resonance

Using the CLEO detector at the Cornell Electron Storage Ring, we have observed the Bs meson in e+e- annihilation at the Y(5S) resonance. We find 14 candidates consistent with Bs decays into final states with a J/psi or a Ds(*)- . The probability that we have observed a background fluctuation is less than 8 x 10(-10) . We have established that at the energy of the Y(5S) resonance Bs production proceeds predominantly through the creation of Bs*Bs* pairs. We find sigma(e+e- --> Bs*Bs*) = [0.11(-0.03))(+0.04)(stat) +/- 0.02(syst)]nb , and set the following limits: sigma(e+e- --> BsBs)/ sigma(e+ e- --> Bs*Bs*) <0.16 and [sigma(e+e- --> BsBs*) + sigma(e+e- --> Bs*Bs)]/sigma(e+e- -->Bs*Bs*) < 0.16 (90% C.L.). The mass of the Bs* meson is measured to be M(Bs*) = [5.414+/- 0.001(stat) +/- 0.003(syst)] GeV/c2 .

Evidence for Bs* Bs* production at the Gamma(5S) resonance

We use data collected by the CLEO III detector at the Cornell Electron Storage Ring to measure the inclusive yields of D(s) mesons as B(Y(5S) --> D(s)X) = (44-7 +/- 4.2 +/- 9.9)% and B(Y(4S) --> D(s)X) = (18.1 +/- 0.5 +/- 2.8)%. From these measurements, we make a model dependent estimate of the ratio of B(s)*B(s)* to the total bb quark pair production of (16.0 +/- 2.6 +/- 5.8)% at the Y(5S) energy.

Improved measurement of B(D+ --> mu+nu) and the pseudoscalar decay constant fD+

We extract a relatively precise value for the decay constant of the meson by measuring B(D+ --> mu+nu) = (4.40 +/-0.66(+0.09)(-0.12) x 10(-4) using 281 pb(-1) of data taken on phi(3770) the resonance with the CLEO-c detector. We find fD+ = (222.6 +/- 16.7(+2.8)(-3.4)) MeV, and compare with current theoretical calculations. We also set a 90% confidence upper limit on B(D+e+nu)< 2.4 x 10(-5) which constrains new physics models.

Search for rare and forbidden decays D+ --> h+/- e+/- e+

Using 0.8 x 10(6) D+ D- pairs collected with the CLEO-c detector at the psi(3770) resonance, we have searched for flavor-changing neutral current and lepton-number-violating decays of D+ mesons to final states with dielectrons. We find no indication of either, obtaining 90% confidence level upper limits of B(D+ --> pi+ e+ e-) < 7.4 x 10(-6), B(D+ --> pi- e+ d+) < 3.6 x 10(-6), B(D+ --> K+ e+ e-) < 6.2 x 10(-6), and B(D+ --> K- e+ e+) < 4.5 x 10(-6).

Absolute branching fraction measurements of exclusive D+ semileptonic decays

Using data collected at the psi(3770) resonance with the CLEO-c detector at the Cornell e+e- storage ring, we present improved measurements of the absolute branching fractions of D+decays to K0e+ve, pi0e+ve, K*0e+ve, and p0e+ve, and the first observation and absolute branching fraction measurement of D+ --> omega e+ve. We also report the most precise tests to date of isospin invariance in semileptonic D0 and D+ decays.

Absolute branching fraction measurements of exclusive D0 semileptonic decays

With the first data sample collected by the CLEO-c detector at the psi(3770) resonance we have studied four exclusive semileptonic decays of the D0 meson. Our results include the first observation and absolute branching fraction measurement for D0 --> p-e+ve and improved measurements of the absolute branching fractions for D0 decays to K-e+ve, pi-e+ve, and K*-e+ve.

Measurement of absolute hadronic branching fractions of D mesons and e+e- -->DD cross sections at Ec.m.=3773 MeV

Using 55.8 pb(-1) of e+e- collisions recorded at the psi(3770) resonance with the CLEO-c detector at CESR, we determine absolute hadronic branching fractions of charged and neutral D mesons using a double tag technique. Among measurements for three D0 and six D+ modes, we obtain reference branching fractions B(D0-->K-pi+)=(3.91+/-0.08+/-0.09)% and B(D+-->K-pi+pi+)=(9.5+/-0.2+/-0.3)%, where the uncertainties are statistical and systematic, respectively. Final state radiation is included in these branching fractions by allowing for additional, unobserved, photons in the final state. Using a determination of the integrated luminosity, we also extract the cross sections sigma(e+e- -->D0D0)=(3.60+/-0.07(+0.07)(-0.05)) nb and sigma(e+e- -->D+D-)=(2.79+/-0.07(+0.10)(-0.04)) nb.

Observation of the hc(1P1) state of charmonium

The h(c)((1)P(1)) state of charmonium has been observed in the reaction psi(2S) --> pi(0)h(c) --> (gammagamma)(gammaeta(c)) using 3.08 x10(6) psi(2S) decays recorded in the CLEO detector. Data have been analyzed both for the inclusive reaction, where the decay products of the eta(c) are not identified, and for exclusive reactions, in which eta(c) decays are reconstructed in seven hadronic decay channels. We find M(h(c)) = 3524.4 +/- 0.6 +/- 0.4 MeV which corresponds to a hyperfine splitting DeltaM(hf)(1P) triple-bond <M((3)P(J)) - M((1)P(1)) = +1.0 +/- 0.6 +/- 0.4 MeV, and B(psi(2S) --> pi(0)h(c)) x B(h(c) --> gammaeta(c)) = (4.0 +/- 0.8 +/- 0.7) x 10(-4).

Observation of thirteen new exclusive multibody hadronic decays of the psi(2S)

Using data accumulated with the CLEO detector corresponding to an integrated luminosity of [symbol: see text] = 5.63 pb(-1) on the peak of the psi(2S) [3.08 x 10(6) psi(2S) decays] and 20.70 pb(-1) at square root of[s] = 3.67 GeV, we report first measurements of the branching fractions for the following 13 decay modes of the psi(2S): eta3pi, &eta'3pi, rhoK+K-, K+K-pi+pi-pi0, 2(K+K-), 2(K+K-)pi0, rhopp, pppi+pi-pi0, etapp, ppK+K-, lambdalambdapi+pi-, lambdapK+, and lambdapK+pi+pi-, and more precise measurements of 8 previously measured modes: 2(pi+pi-), rhopi+pi-, 2(pi+pi-)pi0, omegapi+pi-, K+K-pi+pi-, omegaK+K-, phiK+K-, and pppi+pi-. We also report new branching fraction measurements of phipi+pi- and omegapp and upper limits for etapi+pi-, etaK+K-, and phivpp. Results are compared, where possible, with the corresponding J/psi branching ratios to provide new tests of the 12% rule.

Branching fractions for psi(2S)-to-J/psi transitions

We describe new measurements of the inclusive and exclusive branching fractions for psi(2S) transitions to J/psi using e(+)e(-) collision data collected with the CLEO detector operating at CESR. All branching fractions and ratios of branching fractions reported here represent either the most precise measurements to date or the first direct measurements. Indirectly and in combination with other CLEO measurements, we determine B(chi(cJ) --> gamma(J/psi)) and B[psi(2S) --> light hadrons].

Improved measurement of the form factors in the decay lambda+c-->lambda + nue

Using the CLEO detector at the Cornell Electron Storage Ring, we have studied the distribution of kinematic variables in the decay lambda(+)(c)lambda--> e(+)nu(e). By performing a four-dimensional maximum likelihood fit, we determine the form factor ratio, R= f(2)/f(1) = -0.31 +/- 0.05(stat) +/- 0.04(syst), the pole mass, M(pole) = [2.21 +/- 0.08(stat) +/- 0.14(syst)] GeV/c(2), and the decay asymmetry parameter of the lambda(+)(c), alpha (lambda(c)) = -0.86 +/-0.03(stat) +/- 0.02(syst), for q(2) = 0.67 (GeV/c(2))(2). We compare the angular distributions of the lambda(+)(c) and lambda(-)(c) and find no evidence for CP violation: A(lambda(c)) = (alpha(lambda(c)) + alpha (lambda(c)))/(alpha(lambda(c))-alpha(lambda(c))) = 0.00 +/- 0.03(stat) +/- 0.01(syst) +/- 0.02, where the third error is from the uncertainty in the world average of the CP-violating parameter, A(lambda), for ppi(-).

Photon transitions in Upsilon(2S) and Upsilon(3S) decays

We have studied the inclusive photon spectra in Upsilon(2S) and Upsilon(3S) decays using a large statistics data sample obtained with the CLEO III detector. We present the most precise measurements of electric dipole (E1) photon transition rates and photon energies for Upsilon(2S) --> gammachi(bJ)(1P) and Upsilon(3S) --> gammachi(bJ)(2P) (J = 0, 1, 2). We measure the rate for a rare E1 transition Upsilon(3S) --> gammachi(b0)(1P) for the first time. We also set upper limits on the rates for the hindered magnetic dipole (M1) transitions to the eta(b)(1S) and eta(b)(2S) states.

Search for X(3872) in gammagamma fusion and radiative production at CLEO

We report on a search for the recently reported X(3872) state using 15.1 fb(-1) of e(+)e(-) data taken in the sqrt[s] = 9.46-11.30 GeV region. Separate searches for the production of the X(3872) in untagged gammagamma fusion and e(+)e(-) annihilation following initial state radiation are made by taking advantage of the unique angular correlation between the leptons from the decay J/psi --> l(+)l(-) in X(3872) decay to pi(+)pi(-)J/psi. No signals are observed in either case, and 90% confidence upper limits are established as (2J+1)Gamma(gammagamma)(X(3872))B(X --> pi(+)pi(-)J/psi) < 12.9 eV and Gamma(ee)(X(3872))B(X- -> pi(+)pi(-)J/psi) < 8.3 eV.

Study of the semileptonic charm decays D(0)-->pi(-)l(+)nu and D(0)-->K(-)l(+)nu

We investigate the decays D(0)-->pi(-)l(+)nu and D(0)-->K(-)l(+)nu, where l is e or mu, using approximately 7 fb(-1) of data collected with the CLEO III detector. We find R(0) identical with B(D(0)-->pi(-)e(+)nu)/B(D(0)-->K(-)e(+)nu)=0.082+/-0.006+/-0.005. Fits to the kinematic distributions of the data provide parameters describing the form factor of each mode. Combining the form factor results and R(0) gives |f(pi)(+)(0)|(2)|V(cd)|(2)/|f(K)(+)(0)|(2)|V(cs)|(2)=0.038(+0.006+0.005)(-0.007-0.003).

Measurement of the muonic branching fractions of the narrow upsilon resonances

The decay branching fractions of the three narrow Upsilon resonances to mu(+)mu(-) have been measured by analyzing about 4.3 fb(-1) e(+)e(-) data collected with the CLEO III detector. The branching fraction B(Upsilon(1S)-->mu(+)mu(-))=(2.49+/-0.02+/-0.07)% is consistent with the current world average, but B(Upsilon(2S)-->mu(+)mu(-))=(2.03+/-0.03+/-0.08)% and B(Upsilon(3S)-->mu(+)mu(-))=(2.39+/-0.07+/-0.10)% are significantly larger than prior results. These new muonic branching fractions imply a narrower total decay width for the Upsilon(2S) and Upsilon(3S) resonances and lower other branching fractions that rely on these decays in their determination.

Observation of 1(-)0(-) final states from psi(2S) decays and e(+)e(-) annihilation

Using CLEO data collected from CESR e(+)e(-) collisions at the psi(2S) resonance and nearby continuum at sqrt[s]=3.67 GeV, we report the first significantly nonzero measurements of light vector-pseudoscalar hadron pair production (including rhopi, omegapi, rhoeta, and K(*0)K0 ) and the pi(+)pi(-)pi(0) final state, both from psi(2S) decays and direct e(+)e(-) annihilation.

Search for the lepton-flavor-violating leptonic B(0)-->mu(+/-)tau(-/+) and B(0)-->e(+/-)tau(-/+)

We have searched a sample of 9.6 x 10(6) BB events for the lepton-flavor-violating leptonic B decays, B(0)-->mu(+/-)tau(-/+) and B(0)-->e(+/-)tau(-/+). The tau lepton was detected through the decay modes tau-->lnunu(-) , where l=e, mu. There is no indication of a signal, and we obtain the 90% confidence level upper limits B(B(0)-->mu(+/-)tau(-/+))<3.8 x 10(-5) and B(B(0)-->e(+/-)tau(-/+))<1.3 x 10(-4).

First observation and Dalitz analysis of the D0-->K(0)Setapi(0) decay

Using 9.0 fb(-1) of integrated luminosity in e(+)e(-) collisions near the Upsilon(4S) mass collected with the CLEO II.V detector we report the first observation of the decay D0-->K(0)(S)etapi(0). We measure the ratio of branching fractions, BR(D0-->K(0)(S)etapi(0))BR / (D0-->K(0)(S)pi(0))=0.46+/-0.07+/-0.06. We perform a Dalitz analysis of 155 selected D0-->K(0)(S)etapi(0) candidates and find leading contributions from a(0)(980)K(0)(S) and K(*)(892)eta intermediate states.

Wess-Zumino current and the structure of the decay tau- -->K- pi- K+ nu tau

We present the first study of the vector (Wess-Zumino) current in tau(-)-->K-pi-K+nu(tau) decay using data collected with the CLEO III detector at the Cornell Electron Storage Ring. We determine the quantitative contributions to the decay width from the vector and axial vector currents. Within the framework of a model by Kühn and Mirkes, we identify the quantitative contributions to the total decay rate from the intermediate states omegapi, rho(')pi, and K*K.

Observation of the Hadronic transitions chi(b1,2)(2P)-->omegaUpsilon(1S)

The CLEO Collaboration has made the first observations of hadronic transitions among bottomonium (bbmacr;) states other than the dipion transitions among Upsilon(nS) states. In our study of Upsilon(3S) decays, we find a significant signal for Upsilon(3S)-->gammaomegaUpsilon(1S) that is consistent with radiative decays Upsilon(3S)-->gammachi(b1,2)(2P), followed by chi(b1,2)(2P)-->omegaUpsilon(1S). The branching ratios we obtain are B[chi(b1)(2P)-->omegaUpsilon(1S)]=(1.63(+0.35+0.16)(-0.31-0.15))% and B[chi(b2)(2P)-->omegaUpsilon(1S)]=(1.10(+0.32+0.11)(-0.28-0.10))%, in which the first error is statistical and the second is systematic.

Observation of eta'c production in gammagamma fusion at CLEO

We report on the observation of the eta(')(c)(2(1)S0), the radial excitation of the eta(c)(1(1)S0) ground state of charmonium, in the two-photon fusion reaction gammagamma-->eta(')(c)-->K(0)(S)K+/-pi(-/+) in 13.6 fb(-1) of CLEO II/II.V data and 13.1 fb(-1) of CLEO III data. We obtain M(eta(')(c))=3642.9+/-3.1(stat)+/-1.5(syst) MeV and M(eta(c))=2981.8+/-1.3(stat)+/-1.5(syst) MeV. The corresponding values of hyperfine splittings between 1S0 and 3S1 states are DeltaM(hf)(1S)=115.1+/-2.0 MeV and DeltaM(hf)(2S)=43.1+/-3.4 MeV. Assuming that the eta(c) and eta(')(c) have equal branching fractions to K(S)Kpi, we obtain Gamma(gammagamma)(eta(')(c))=1.3+/-0.6 keV.

Branching fractions of tau leptons to three charged hadrons

From electron-positron collision data collected with the CLEO detector operating at Cornell Electron Storage Ring near sqrt[s]=10.6 GeV, improved measurements of the branching fractions for tau decays into three explicitly identified hadrons and a neutrino are presented as B(tau(-)-->pi(-)pi(+)pi(-)nu(tau))=(9.13+/-0.05+/-0.46)%, B(tau(-)-->K-pi(+)pi(-)nu(tau))=(3.84+/-0.14+/-0.38) x 10(-3), B(tau(-)-->K-K+pi(-)nu(tau))=(1.55+/-0.06+/-0.09) x 10(-3), and B(tau(-)-->K-K+K-nu(tau))<3.7 x 10(-5) at 90% C.L., where the uncertainties are statistical and systematic, respectively.

First search for the flavor changing neutral current decay D0-->gammagamma

Using 13.8 fb(-1) of data collected at or just below the Upsilon(4S) with the CLEO detector, we report the result of a search for the flavor changing neutral current process D0-->gammagamma. We observe no significant signal for this decay mode and determine 90% confidence level upper limits on the branching fractions B(D0-->gammagamma)/B(D0-->pi(0)pi(0))<0.033 and B(D0-->gammagamma)<2.9 x 10(-5).