1
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Armstrong W, Kang H, Liyanage A, Maxwell J, Mulholland J, Ndukum L, Ahmidouch A, Albayrak I, Asaturyan A, Ates O, Baghdasaryan H, Boeglin W, Bosted P, Brash E, Butuceanu C, Bychkov M, Carter P, Chen C, Chen JP, Choi S, Christy ME, Covrig S, Crabb D, Danagoulian S, Daniel A, Davidenko AM, Davis B, Day D, Deconinck W, Deur A, Dunne J, Dutta D, El Fassi L, Ellis C, Ent R, Flay D, Frlez E, Gaskell D, Geagla O, German J, Gilman R, Gogami T, Gomez J, Goncharenko YM, Hashimoto O, Higinbotham D, Horn T, Huber GM, Jones M, Jones MK, Kalantarians N, Kang HK, Kawama D, Keith C, Keppel C, Khandaker M, Kim Y, King PM, Kohl M, Kovacs K, Kubarovsky V, Li Y, Liyanage N, Luo W, Mack D, Mamyan V, Markowitz P, Maruta T, Meekins D, Melnik YM, Meziani ZE, Mkrtchyan A, Mkrtchyan H, Mochalov VV, Monaghan P, Narayan A, Nakamura SN, Nuruzzaman A, Pentchev L, Pocanic D, Posik M, Puckett A, Qiu X, Reinhold J, Riordan S, Roche J, Rondón OA, Sawatzky B, Shabestari M, Slifer K, Smith G, Soloviev LF, Solvignon P, Tadevosyan V, Tang L, Vasiliev AN, Veilleux M, Walton T, Wesselmann F, Wood S, Yao H, Ye Z, Zhang J, Zhu L. Revealing Color Forces with Transverse Polarized Electron Scattering. Phys Rev Lett 2019; 122:022002. [PMID: 30720291 DOI: 10.1103/physrevlett.122.022002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 10/18/2018] [Indexed: 06/09/2023]
Abstract
The Spin Asymmetries of the Nucleon Experiment measured two double spin asymmetries using a polarized proton target and polarized electron beam at two beam energies, 4.7 and 5.9 GeV. A large-acceptance open-configuration detector package identified scattered electrons at 40° and covered a wide range in Bjorken x (0.3<x<0.8). Proportional to an average color Lorentz force, the twist-3 matrix element, d[over ˜]_{2}^{p}, was extracted from the measured asymmetries at Q^{2} values ranging from 2.0 to 6.0 GeV^{2}. The data display the opposite sign compared to most quark models, including the lattice QCD result, and an unexpected scale dependence. Furthermore, when combined with the neutron data in the same Q^{2} range the results suggest a flavor independent average color Lorentz force.
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Affiliation(s)
- W Armstrong
- Temple University, Philadelphia, Pennsylvania 19122, USA
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - H Kang
- Seoul National University, Seoul, South Korea
| | - A Liyanage
- Hampton University, Hampton, Virginia 23669, USA
| | - J Maxwell
- University of Virginia, Charlottesville, Virginia 22904, USA
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Mulholland
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - L Ndukum
- Mississippi State University, Starkville, Mississippi 39759, USA
| | - A Ahmidouch
- North Carolina A&M State University, Greensboro, North Carolina 27411, USA
| | - I Albayrak
- Hampton University, Hampton, Virginia 23669, USA
| | - A Asaturyan
- Yerevan Physics Institute, 0036, Yerevan, Armenia
| | - O Ates
- Hampton University, Hampton, Virginia 23669, USA
| | - H Baghdasaryan
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - W Boeglin
- Florida International University, Miami, Florida 33199, USA
| | - P Bosted
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - E Brash
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - C Butuceanu
- University of Regina, Regina, Saskatchewan, S4S 0A2, Canada
| | - M Bychkov
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - P Carter
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - C Chen
- Hampton University, Hampton, Virginia 23669, USA
| | - J-P Chen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Choi
- Seoul National University, Seoul, South Korea
| | - M E Christy
- Hampton University, Hampton, Virginia 23669, USA
| | - S Covrig
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D Crabb
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - S Danagoulian
- North Carolina A&M State University, Greensboro, North Carolina 27411, USA
| | - A Daniel
- Ohio University, Athens, Ohio 45701, USA
| | - A M Davidenko
- Kurchatov Institute-IHEP, Protvino, Moskva 123098, Russia
| | - B Davis
- North Carolina A&M State University, Greensboro, North Carolina 27411, USA
| | - D Day
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - W Deconinck
- William & Mary, Williamsburg, Virginia 23185, USA
| | - A Deur
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Dunne
- Mississippi State University, Starkville, Mississippi 39759, USA
| | - D Dutta
- Mississippi State University, Starkville, Mississippi 39759, USA
| | - L El Fassi
- Mississippi State University, Starkville, Mississippi 39759, USA
- Rutgers University, New Brunswick, New Jersey 08901, USA
| | - C Ellis
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Ent
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D Flay
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - E Frlez
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - D Gaskell
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - O Geagla
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - J German
- North Carolina A&M State University, Greensboro, North Carolina 27411, USA
| | - R Gilman
- Rutgers University, New Brunswick, New Jersey 08901, USA
| | - T Gogami
- Tohoku University, Tohoku, Miyagi Prefecture 980-8577, Japan
| | - J Gomez
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - O Hashimoto
- Tohoku University, Tohoku, Miyagi Prefecture 980-8577, Japan
| | - D Higinbotham
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - T Horn
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - G M Huber
- University of Regina, Regina, Saskatchewan, S4S 0A2, Canada
| | - M Jones
- North Carolina A&M State University, Greensboro, North Carolina 27411, USA
| | - M K Jones
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - N Kalantarians
- University of Virginia, Charlottesville, Virginia 22904, USA
- Virginia Union University, Richmond, Virginia 23220, USA
| | - H-K Kang
- Seoul National University, Seoul, South Korea
| | - D Kawama
- Tohoku University, Tohoku, Miyagi Prefecture 980-8577, Japan
| | - C Keith
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - C Keppel
- Hampton University, Hampton, Virginia 23669, USA
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M Khandaker
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - Y Kim
- Seoul National University, Seoul, South Korea
| | - P M King
- Ohio University, Athens, Ohio 45701, USA
| | - M Kohl
- Hampton University, Hampton, Virginia 23669, USA
| | - K Kovacs
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - V Kubarovsky
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Rensselaer Polytechnic Institute, Troy, New York 12180, USA
| | - Y Li
- Hampton University, Hampton, Virginia 23669, USA
| | - N Liyanage
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - W Luo
- Lanzhou University, Lanzhou, Gansu Sheng, China
| | - D Mack
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - V Mamyan
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - P Markowitz
- Florida International University, Miami, Florida 33199, USA
| | - T Maruta
- Tohoku University, Tohoku, Miyagi Prefecture 980-8577, Japan
| | - D Meekins
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Y M Melnik
- Kurchatov Institute-IHEP, Protvino, Moskva 123098, Russia
| | - Z-E Meziani
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - A Mkrtchyan
- Yerevan Physics Institute, 0036, Yerevan, Armenia
| | - H Mkrtchyan
- Yerevan Physics Institute, 0036, Yerevan, Armenia
| | - V V Mochalov
- Kurchatov Institute-IHEP, Protvino, Moskva 123098, Russia
| | - P Monaghan
- Hampton University, Hampton, Virginia 23669, USA
| | - A Narayan
- Mississippi State University, Starkville, Mississippi 39759, USA
| | - S N Nakamura
- Tohoku University, Tohoku, Miyagi Prefecture 980-8577, Japan
| | - A Nuruzzaman
- Mississippi State University, Starkville, Mississippi 39759, USA
| | - L Pentchev
- William & Mary, Williamsburg, Virginia 23185, USA
| | - D Pocanic
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - M Posik
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - A Puckett
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - X Qiu
- Hampton University, Hampton, Virginia 23669, USA
| | - J Reinhold
- Florida International University, Miami, Florida 33199, USA
| | - S Riordan
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - J Roche
- Ohio University, Athens, Ohio 45701, USA
| | - O A Rondón
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - B Sawatzky
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - M Shabestari
- University of Virginia, Charlottesville, Virginia 22904, USA
- Mississippi State University, Starkville, Mississippi 39759, USA
| | - K Slifer
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - G Smith
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - L F Soloviev
- Kurchatov Institute-IHEP, Protvino, Moskva 123098, Russia
| | - P Solvignon
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - V Tadevosyan
- Yerevan Physics Institute, 0036, Yerevan, Armenia
| | - L Tang
- Hampton University, Hampton, Virginia 23669, USA
| | - A N Vasiliev
- Kurchatov Institute-IHEP, Protvino, Moskva 123098, Russia
| | - M Veilleux
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - T Walton
- Hampton University, Hampton, Virginia 23669, USA
| | - F Wesselmann
- Xavier University, New Orleans, Louisiana 70125, USA
| | - S Wood
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - H Yao
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - Z Ye
- Hampton University, Hampton, Virginia 23669, USA
| | - J Zhang
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - L Zhu
- Hampton University, Hampton, Virginia 23669, USA
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Fanelli C, Cisbani E, Hamilton DJ, Salmé G, Wojtsekhowski B, Ahmidouch A, Annand JRM, Baghdasaryan H, Beaufait J, Bosted P, Brash EJ, Butuceanu C, Carter P, Christy E, Chudakov E, Danagoulian S, Day D, Degtyarenko P, Ent R, Fenker H, Fowler M, Frlez E, Gaskell D, Gilman R, Horn T, Huber GM, de Jager CW, Jensen E, Jones MK, Kelleher A, Keppel C, Khandaker M, Kohl M, Kumbartzki G, Lassiter S, Li Y, Lindgren R, Lovelace H, Luo W, Mack D, Mamyan V, Margaziotis DJ, Markowitz P, Maxwell J, Mbianda G, Meekins D, Meziane M, Miller J, Mkrtchyan A, Mkrtchyan H, Mulholland J, Nelyubin V, Pentchev L, Perdrisat CF, Piasetzky E, Prok Y, Puckett AJR, Punjabi V, Shabestari M, Shahinyan A, Slifer K, Smith G, Solvignon P, Subedi R, Wesselmann FR, Wood S, Ye Z, Zheng X. Polarization Transfer in Wide-Angle Compton Scattering and Single-Pion Photoproduction from the Proton. Phys Rev Lett 2015; 115:152001. [PMID: 26550716 DOI: 10.1103/physrevlett.115.152001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Indexed: 06/05/2023]
Abstract
Wide-angle exclusive Compton scattering and single-pion photoproduction from the proton have been investigated via measurement of the polarization transfer from a circularly polarized photon beam to the recoil proton. The wide-angle Compton scattering polarization transfer was analyzed at an incident photon energy of 3.7 GeV at a proton scattering angle of θ_{cm}^{p}=70°. The longitudinal transfer K_{LL}, measured to be 0.645±0.059±0.048, where the first error is statistical and the second is systematic, has the same sign as predicted for the reaction mechanism in which the photon interacts with a single quark carrying the spin of the proton. However, the observed value is ~3 times larger than predicted by the generalized-parton-distribution-based calculations, which indicates a significant unknown contribution to the scattering amplitude.
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Affiliation(s)
- C Fanelli
- Dipartimento di Fisica, Università La Sapienza, Rome, Italy and INFN, Sezione di Roma, 00185 Rome, Italy
- INFN, Sezione di Roma, gruppo Sanità and Istituto Superiore di Sanità, 00161 Rome, Italy
| | - E Cisbani
- INFN, Sezione di Roma, gruppo Sanità and Istituto Superiore di Sanità, 00161 Rome, Italy
| | - D J Hamilton
- University of Glasgow, Glasgow G12 8QQ, Scotland, United Kingdom
| | - G Salmé
- Dipartimento di Fisica, Università La Sapienza, Rome, Italy and INFN, Sezione di Roma, 00185 Rome, Italy
| | - B Wojtsekhowski
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - A Ahmidouch
- North Carolina A&T State University, Greensboro, North Carolina 27411, USA
| | - J R M Annand
- University of Glasgow, Glasgow G12 8QQ, Scotland, United Kingdom
| | - H Baghdasaryan
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - J Beaufait
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - P Bosted
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - E J Brash
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - C Butuceanu
- University of Regina, Regina, Saskatchewan S4S OA2, Canada
| | - P Carter
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - E Christy
- Hampton University, Hampton, Virginia 23668, USA
| | - E Chudakov
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Danagoulian
- North Carolina A&T State University, Greensboro, North Carolina 27411, USA
| | - D Day
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - P Degtyarenko
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Ent
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - H Fenker
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M Fowler
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - E Frlez
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - D Gaskell
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Gilman
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - T Horn
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - G M Huber
- University of Regina, Regina, Saskatchewan S4S OA2, Canada
| | - C W de Jager
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - E Jensen
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - M K Jones
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - A Kelleher
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - C Keppel
- Hampton University, Hampton, Virginia 23668, USA
| | - M Khandaker
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - M Kohl
- Hampton University, Hampton, Virginia 23668, USA
| | - G Kumbartzki
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - S Lassiter
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Y Li
- Hampton University, Hampton, Virginia 23668, USA
| | - R Lindgren
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - H Lovelace
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - W Luo
- Lanzhou University, Lanzhou 730000, Gansu, People's Republic of China
| | - D Mack
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - V Mamyan
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - D J Margaziotis
- California State University Los Angeles, Los Angeles, California 90032, USA
| | - P Markowitz
- Florida International University, Miami, Florida 33199, USA
| | - J Maxwell
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - G Mbianda
- University of Witwatersrand, Johannesburg, South Africa
| | - D Meekins
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M Meziane
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - J Miller
- University of Maryland, College Park, Maryland 20742, USA
| | - A Mkrtchyan
- Yerevan Physics Institute, Yerevan 375036, Armenia
| | - H Mkrtchyan
- Yerevan Physics Institute, Yerevan 375036, Armenia
| | - J Mulholland
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - V Nelyubin
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - L Pentchev
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - C F Perdrisat
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - E Piasetzky
- University of Tel Aviv, Tel Aviv 6997801, Israel
| | - Y Prok
- Christopher Newport University, Newport News, Virginia 23606, USA
| | - A J R Puckett
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - V Punjabi
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - M Shabestari
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - A Shahinyan
- Yerevan Physics Institute, Yerevan 375036, Armenia
| | - K Slifer
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - G Smith
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - P Solvignon
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - R Subedi
- University of Virginia, Charlottesville, Virginia 22904, USA
| | | | - S Wood
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Z Ye
- Hampton University, Hampton, Virginia 23668, USA
| | - X Zheng
- University of Virginia, Charlottesville, Virginia 22904, USA
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3
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Korover I, Muangma N, Hen O, Shneor R, Sulkosky V, Kelleher A, Gilad S, Higinbotham DW, Piasetzky E, Watson JW, Wood SA, Aguilera P, Ahmed Z, Albataineh H, Allada K, Anderson B, Anez D, Aniol K, Annand J, Armstrong W, Arrington J, Averett T, Badman T, Baghdasaryan H, Bai X, Beck A, Beck S, Bellini V, Benmokhtar F, Bertozzi W, Bittner J, Boeglin W, Camsonne A, Chen C, Chen JP, Chirapatpimol K, Cisbani E, Dalton MM, Daniel A, Day D, de Jager CW, De Leo R, Deconinck W, Defurne M, Flay D, Fomin N, Friend M, Frullani S, Fuchey E, Garibaldi F, Gaskell D, Gilman R, Glamazdin O, Gu C, Gueye P, Hamilton D, Hanretty C, Hansen JO, Hashemi Shabestari M, Holmstrom T, Huang M, Iqbal S, Jin G, Kalantarians N, Kang H, Khandaker M, LeRose J, Leckey J, Lindgren R, Long E, Mammei J, Margaziotis DJ, Markowitz P, Marti Jimenez-Arguello A, Meekins D, Meziani Z, Michaels R, Mihovilovic M, Monaghan P, Munoz Camacho C, Norum B, Pan K, Phillips S, Pomerantz I, Posik M, Punjabi V, Qian X, Qiang Y, Qiu X, Rakhman A, Reimer PE, Riordan S, Ron G, Rondon-Aramayo O, Saha A, Schulte E, Selvy L, Shahinyan A, Sirca S, Sjoegren J, Slifer K, Solvignon P, Sparveris N, Subedi R, Tireman W, Wang D, Weinstein LB, Wojtsekhowski B, Yan W, Yaron I, Ye Z, Zhan X, Zhang J, Zhang Y, Zhao B, Zhao Z, Zheng X, Zhu P, Zielinski R. Probing the repulsive core of the nucleon-nucleon interaction via the (4)He(e,e'pN) triple-coincidence reaction. Phys Rev Lett 2014; 113:022501. [PMID: 25062168 DOI: 10.1103/physrevlett.113.022501] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Indexed: 06/03/2023]
Abstract
We studied simultaneously the (4)He(e,e'p), (4)He(e,e'pp), and (4)He(e,e'pn) reactions at Q(2)=2(GeV/c)(2) and x(B)>1, for an (e,e'p) missing-momentum range of 400 to 830 MeV/c. The knocked-out proton was detected in coincidence with a proton or neutron recoiling almost back to back to the missing momentum, leaving the residual A=2 system at low excitation energy. These data were used to identify two-nucleon short-range correlated pairs and to deduce their isospin structure as a function of missing momentum, in a region where the nucleon-nucleon (NN) force is expected to change from predominantly tensor to repulsive. The abundance of neutron-proton pairs is reduced as the nucleon momentum increases beyond ∼500 MeV/c. The extracted fraction of proton-proton pairs is small and almost independent of the missing momentum. Our data are compared with calculations of two-nucleon momentum distributions in (4)He and discussed in the context of probing the elusive repulsive component of the NN force.
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Affiliation(s)
- I Korover
- Tel Aviv University, Tel Aviv 69978, Israel
| | - N Muangma
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - O Hen
- Tel Aviv University, Tel Aviv 69978, Israel
| | - R Shneor
- Tel Aviv University, Tel Aviv 69978, Israel
| | - V Sulkosky
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA and Longwood University, Farmville, Virginia 23909, USA
| | - A Kelleher
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - S Gilad
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - D W Higinbotham
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - J W Watson
- Kent State University, Kent, Ohio 44242, USA
| | - S A Wood
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - P Aguilera
- Institut de Physique Nucléaire (UMR 8608), CNRS/IN2P3-Université Paris-Sud, F-91406 Orsay Cedex, France
| | - Z Ahmed
- Syracuse University, Syracuse, New York 13244, USA
| | - H Albataineh
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - K Allada
- University of Kentucky, Lexington, Kentucky 40506, USA
| | - B Anderson
- Kent State University, Kent, Ohio 44242, USA
| | - D Anez
- Saint Mary's University, Halifax, Nova Scotia, Canada
| | - K Aniol
- California State University, Los Angeles, Los Angeles, California 90032, USA
| | - J Annand
- University of Glasgow, Glasgow G12 8QQ, Scotland, United Kingdom
| | - W Armstrong
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - J Arrington
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - T Averett
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - T Badman
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - H Baghdasaryan
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - X Bai
- China Institute of Atomic Energy, Beijing, China
| | - A Beck
- Nuclear Research Center Negev, Beer-Sheva, Israel
| | - S Beck
- Nuclear Research Center Negev, Beer-Sheva, Israel
| | - V Bellini
- Universita di Catania, Catania, Italy
| | - F Benmokhtar
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - W Bertozzi
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J Bittner
- Longwood University, Farmville, Virginia 23909, USA
| | - W Boeglin
- Florida International University, Miami, Florida 33199, USA
| | - A Camsonne
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - C Chen
- Hampton University, Hampton, Virginia 23668, USA
| | - J-P Chen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - K Chirapatpimol
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - E Cisbani
- INFN, Sezione Sanità and Istituto Superiore di Sanità, 00161 Rome, Italy
| | - M M Dalton
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - A Daniel
- Ohio University, Athens, Ohio 45701, USA
| | - D Day
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - C W de Jager
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and University of Virginia, Charlottesville, Virginia 22904, USA
| | - R De Leo
- INFN, Sezione di Bari and University of Bari, I-70126 Bari, Italy
| | - W Deconinck
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - M Defurne
- CEA Saclay, F-91191 Gif-sur-Yvette, France
| | - D Flay
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - N Fomin
- University of Tennessee, Knoxville, Tennessee 37996, USA
| | - M Friend
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - S Frullani
- INFN, Sezione Sanità and Istituto Superiore di Sanità, 00161 Rome, Italy
| | - E Fuchey
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - F Garibaldi
- INFN, Sezione Sanità and Istituto Superiore di Sanità, 00161 Rome, Italy
| | - D Gaskell
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Gilman
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - O Glamazdin
- Kharkov Institute of Physics and Technology, Kharkov 61108, Ukraine
| | - C Gu
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - P Gueye
- Hampton University, Hampton, Virginia 23668, USA
| | - D Hamilton
- University of Glasgow, Glasgow G12 8QQ, Scotland, United Kingdom
| | - C Hanretty
- Florida State University, Tallahassee, Florida 32306, USA
| | - J-O Hansen
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - T Holmstrom
- Longwood University, Farmville, Virginia 23909, USA
| | - M Huang
- Duke University, Durham, North Carolina 27708, USA
| | - S Iqbal
- California State University, Los Angeles, Los Angeles, California 90032, USA
| | - G Jin
- University of Virginia, Charlottesville, Virginia 22904, USA
| | | | - H Kang
- Seoul National University, Seoul, Korea
| | - M Khandaker
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J LeRose
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Leckey
- Indiana University, Bloomington, Indiana 47405, USA
| | - R Lindgren
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - E Long
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - J Mammei
- Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
| | - D J Margaziotis
- California State University, Los Angeles, Los Angeles, California 90032, USA
| | - P Markowitz
- Florida International University, Miami, Florida 33199, USA
| | | | - D Meekins
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Z Meziani
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - R Michaels
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - P Monaghan
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA and Hampton University, Hampton, Virginia 23668, USA
| | | | - B Norum
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - K Pan
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - S Phillips
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - I Pomerantz
- Tel Aviv University, Tel Aviv 69978, Israel and The University of Texas at Austin, Austin, Texas 78712, USA
| | - M Posik
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - V Punjabi
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - X Qian
- Duke University, Durham, North Carolina 27708, USA
| | - Y Qiang
- Duke University, Durham, North Carolina 27708, USA
| | - X Qiu
- Lanzhou University, Lanzhou, China
| | - A Rakhman
- Syracuse University, Syracuse, New York 13244, USA
| | - P E Reimer
- Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - S Riordan
- University of Virginia, Charlottesville, Virginia 22904, USA and University of Massachusetts, Amherst, Massachusetts 01006, USA
| | - G Ron
- Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem, Israel
| | - O Rondon-Aramayo
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - A Saha
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - E Schulte
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - L Selvy
- Kent State University, Kent, Ohio 44242, USA
| | - A Shahinyan
- Yerevan Physics Institute, Yerevan 375036, Armenia
| | - S Sirca
- University of Ljubljana, Ljubljana, Slovenia
| | - J Sjoegren
- University of Glasgow, Glasgow G12 8QQ, Scotland, United Kingdom
| | - K Slifer
- University of New Hampshire, Durham, New Hampshire 03824, USA
| | - P Solvignon
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - N Sparveris
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - R Subedi
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - W Tireman
- Northern Michigan University, Marquette, Michigan 49855, USA
| | - D Wang
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - L B Weinstein
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - B Wojtsekhowski
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - W Yan
- University of Science and Technology, Hefei, China
| | - I Yaron
- Tel Aviv University, Tel Aviv 69978, Israel
| | - Z Ye
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - X Zhan
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J Zhang
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Y Zhang
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - B Zhao
- College of William and Mary, Williamsburg, Virginia 23187, USA
| | - Z Zhao
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - X Zheng
- University of Virginia, Charlottesville, Virginia 22904, USA
| | - P Zhu
- University of Science and Technology, Hefei, China
| | - R Zielinski
- University of New Hampshire, Durham, New Hampshire 03824, USA
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4
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Pomerantz I, Ilieva Y, Gilman R, Higinbotham DW, Piasetzky E, Strauch S, Adhikari KP, Aghasyan M, Allada K, Amaryan MJ, Anefalos Pereira S, Anghinolfi M, Baghdasaryan H, Ball J, Baltzell NA, Battaglieri M, Batourine V, Beck A, Beck S, Bedlinskiy I, Berman BL, Biselli AS, Boeglin W, Bono J, Bookwalter C, Boiarinov S, Briscoe WJ, Brooks WK, Bubis N, Burkert V, Camsonne A, Canan M, Carman DS, Celentano A, Chandavar S, Charles G, Chirapatpimol K, Cisbani E, Cole PL, Contalbrigo M, Crede V, Cusanno F, D'Angelo A, Daniel A, Dashyan N, de Jager CW, De Vita R, De Sanctis E, Deur A, Djalali C, Dodge GE, Doughty D, Dupre R, Dutta C, Egiyan H, El Alaoui A, El Fassi L, Eugenio P, Fedotov G, Fegan S, Fleming JA, Fradi A, Garibaldi F, Geagla O, Gevorgyan N, Giovanetti KL, Girod FX, Glister J, Goetz JT, Gohn W, Golovatch E, Gothe RW, Griffioen KA, Guegan B, Guidal M, Guo L, Hafidi K, Hakobyan H, Harrison N, Heddle D, Hicks K, Ho D, Holtrop M, Hyde CE, Ireland DG, Ishkhanov BS, Isupov EL, Jiang X, Jo HS, Joo K, Katramatou AT, Keller D, Khandaker M, Khetarpal P, Khrosinkova E, Kim A, Kim W, Klein FJ, Koirala S, Kubarovsky A, Kubarovsky V, Kuleshov SV, Kvaltine ND, Lee B, LeRose JJ, Lewis S, Lindgren R, Livingston K, Lu HY, MacGregor IJD, Mao Y, Martinez D, Mayer M, McCullough E, McKinnon B, Meekins D, Meyer CA, Michaels R, Mineeva T, Mirazita M, Moffit B, Mokeev V, Montgomery RA, Moutarde H, Munevar E, Munoz Camacho C, Nadel-Turonski P, Nasseripour R, Nepali CS, Niccolai S, Niculescu G, Niculescu I, Osipenko M, Ostrovidov AI, Pappalardo LL, Paremuzyan R, Park K, Park S, Petratos GG, Phelps E, Pisano S, Pogorelko O, Pozdniakov S, Procureur S, Protopopescu D, Puckett AJR, Qian X, Qiang Y, Ricco G, Rimal D, Ripani M, Ritchie BG, Rodriguez I, Ron G, Rosner G, Rossi P, Sabatié F, Saha A, Saini MS, Sarty AJ, Sawatzky B, Saylor NA, Schott D, Schulte E, Schumacher RA, Seder E, Seraydaryan H, Shneor R, Smith GD, Sokhan D, Sparveris N, Stepanyan SS, Stepanyan S, Stoler P, Subedi R, Sulkosky V, Taiuti M, Tang W, Taylor CE, Tkachenko S, Ungaro M, Vernarsky B, Vineyard MF, Voskanyan H, Voutier E, Walford NK, Wang Y, Watts DP, Weinstein LB, Weygand DP, Wojtsekhowski B, Wood MH, Yan X, Yao H, Zachariou N, Zhan X, Zhang J, Zhao ZW, Zheng X, Zonta I. Hard two-body photodisintegration of 3He. Phys Rev Lett 2013; 110:242301. [PMID: 25165915 DOI: 10.1103/physrevlett.110.242301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Indexed: 06/03/2023]
Abstract
We have measured cross sections for the γ(3)He → pd reaction at photon energies of 0.4-1.4 GeV and a center-of-mass angle of 90°. We observe dimensional scaling above 0.7 GeV at this center-of-mass angle. This is the first observation of dimensional scaling in the photodisintegration of a nucleus heavier than the deuteron.
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Affiliation(s)
- I Pomerantz
- Tel Aviv University, Tel Aviv 69978, Israel and The University of Texas at Austin, Austin, Texas 78712, USA
| | - Y Ilieva
- University of South Carolina, Columbia, South Carolina 29208, USA
| | - R Gilman
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - D W Higinbotham
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - S Strauch
- University of South Carolina, Columbia, South Carolina 29208, USA
| | - K P Adhikari
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - M Aghasyan
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
| | - K Allada
- University of Kentucky, Lexington, Kentucky 40506, USA
| | - M J Amaryan
- Old Dominion University, Norfolk, Virginia 23529, USA
| | | | | | - H Baghdasaryan
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - J Ball
- CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
| | - N A Baltzell
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | | | - V Batourine
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - A Beck
- NRCN, P.O. Box 9001, Beer-Sheva 84190, Israel
| | - S Beck
- NRCN, P.O. Box 9001, Beer-Sheva 84190, Israel
| | - I Bedlinskiy
- Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia
| | - B L Berman
- The George Washington University, Washington, D.C. 20052, USA
| | - A S Biselli
- Fairfield University, Fairfield, Connecticut 06824, USA and Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA
| | - W Boeglin
- Florida International University, Miami, Florida 33199, USA
| | - J Bono
- Florida International University, Miami, Florida 33199, USA
| | - C Bookwalter
- Florida State University, Tallahassee, Florida 32306, USA
| | - S Boiarinov
- Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - W J Briscoe
- The George Washington University, Washington, D.C. 20052, USA
| | - W K Brooks
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
| | - N Bubis
- Tel Aviv University, Tel Aviv 69978, Israel
| | - V Burkert
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - A Camsonne
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M Canan
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - D S Carman
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - A Celentano
- INFN, Sezione di Genova, 16146 Genova, Italy
| | | | - G Charles
- CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
| | - K Chirapatpimol
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - E Cisbani
- INFN, Gruppo collegato Sanità and Istituto Superiore di Sanità, Department TESA, I-00161 Rome, Italy
| | - P L Cole
- Idaho State University, Pocatello, Idaho 83209, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - V Crede
- Florida State University, Tallahassee, Florida 32306, USA
| | - F Cusanno
- INFN, Gruppo collegato Sanità and Istituto Superiore di Sanità, Department TESA, I-00161 Rome, Italy
| | - A D'Angelo
- INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy and Università di Roma Tor Vergata, 00133 Rome, Italy
| | - A Daniel
- Ohio University, Athens, Ohio 45701, USA
| | - N Dashyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
| | - C W de Jager
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R De Vita
- INFN, Sezione di Genova, 16146 Genova, Italy
| | - E De Sanctis
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
| | - A Deur
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - C Djalali
- University of South Carolina, Columbia, South Carolina 29208, USA
| | - G E Dodge
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - D Doughty
- Christopher Newport University, Newport News, Virginia 23606, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Dupre
- CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
| | - C Dutta
- University of Kentucky, Lexington, Kentucky 40506, USA
| | - H Egiyan
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA and College of William and Mary, Williamsburg, Virginia 23187-8795, USA
| | - A El Alaoui
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - L El Fassi
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - P Eugenio
- Florida State University, Tallahassee, Florida 32306, USA
| | - G Fedotov
- University of South Carolina, Columbia, South Carolina 29208, USA
| | - S Fegan
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - J A Fleming
- Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
| | - A Fradi
- Institut de Physique Nucléaire ORSAY, Orsay 91406, France
| | - F Garibaldi
- INFN, Gruppo collegato Sanità and Istituto Superiore di Sanità, Department TESA, I-00161 Rome, Italy
| | - O Geagla
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - N Gevorgyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
| | - K L Giovanetti
- James Madison University, Harrisonburg, Virginia 22807, USA
| | - F X Girod
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - J Glister
- Dalhousie University, Halifax, Nova Scotia B3H 3J5, Canada and Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada
| | - J T Goetz
- University of California at Los Angeles, Los Angeles, California 90095-1547, USA
| | - W Gohn
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - E Golovatch
- INFN, Sezione di Genova, 16146 Genova, Italy and Skobeltsyn Nuclear Physics Institute, 119899 Moscow, Russia
| | - R W Gothe
- University of South Carolina, Columbia, South Carolina 29208, USA
| | - K A Griffioen
- College of William and Mary, Williamsburg, Virginia 23187-8795, USA
| | - B Guegan
- Institut de Physique Nucléaire ORSAY, Orsay 91406, France
| | - M Guidal
- Institut de Physique Nucléaire ORSAY, Orsay 91406, France
| | - L Guo
- Florida International University, Miami, Florida 33199, USA
| | - K Hafidi
- Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - H Hakobyan
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile and Yerevan Physics Institute, 375036 Yerevan, Armenia
| | - N Harrison
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - D Heddle
- Christopher Newport University, Newport News, Virginia 23606, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - K Hicks
- Ohio University, Athens, Ohio 45701, USA
| | - D Ho
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - M Holtrop
- University of New Hampshire, Durham, New Hampshire 03824-3568, USA
| | - C E Hyde
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - D G Ireland
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - B S Ishkhanov
- Skobeltsyn Nuclear Physics Institute, 119899 Moscow, Russia
| | - E L Isupov
- Skobeltsyn Nuclear Physics Institute, 119899 Moscow, Russia
| | - X Jiang
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - H S Jo
- Institut de Physique Nucléaire ORSAY, Orsay 91406, France
| | - K Joo
- University of Connecticut, Storrs, Connecticut 06269, USA and University of Virginia, Charlottesville, Virginia 22901, USA
| | | | - D Keller
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - M Khandaker
- Norfolk State University, Norfolk, Virginia 23504, USA
| | - P Khetarpal
- Florida International University, Miami, Florida 33199, USA
| | | | - A Kim
- Kyungpook National University, Daegu 702-701, Republic of Korea
| | - W Kim
- Kyungpook National University, Daegu 702-701, Republic of Korea
| | - F J Klein
- Catholic University of America, Washington, D.C. 20064, USA
| | - S Koirala
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - A Kubarovsky
- Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA and Skobeltsyn Nuclear Physics Institute, 119899 Moscow, Russia
| | - V Kubarovsky
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S V Kuleshov
- Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia and Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
| | - N D Kvaltine
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - B Lee
- Kent State University, Kent, Ohio 44242, USA
| | - J J LeRose
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Lewis
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - R Lindgren
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - K Livingston
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - H Y Lu
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | | | - Y Mao
- University of South Carolina, Columbia, South Carolina 29208, USA
| | - D Martinez
- Idaho State University, Pocatello, Idaho 83209, USA
| | - M Mayer
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - E McCullough
- Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada
| | - B McKinnon
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - D Meekins
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - C A Meyer
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - R Michaels
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - T Mineeva
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - M Mirazita
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
| | - B Moffit
- College of William and Mary, Williamsburg, Virginia 23187-8795, USA
| | - V Mokeev
- Skobeltsyn Nuclear Physics Institute, 119899 Moscow, Russia and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - H Moutarde
- CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
| | - E Munevar
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | | | - P Nadel-Turonski
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - R Nasseripour
- Florida International University, Miami, Florida 33199, USA and James Madison University, Harrisonburg, Virginia 22807, USA
| | - C S Nepali
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - S Niccolai
- Institut de Physique Nucléaire ORSAY, Orsay 91406, France
| | - G Niculescu
- James Madison University, Harrisonburg, Virginia 22807, USA and Ohio University, Athens, Ohio 45701, USA
| | - I Niculescu
- The George Washington University, Washington, D.C. 20052, USA and James Madison University, Harrisonburg, Virginia 22807, USA
| | - M Osipenko
- INFN, Sezione di Genova, 16146 Genova, Italy
| | - A I Ostrovidov
- Florida State University, Tallahassee, Florida 32306, USA
| | | | - R Paremuzyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
| | - K Park
- Kyungpook National University, Daegu 702-701, Republic of Korea and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - S Park
- Florida State University, Tallahassee, Florida 32306, USA
| | | | - E Phelps
- University of South Carolina, Columbia, South Carolina 29208, USA
| | - S Pisano
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
| | - O Pogorelko
- Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia
| | - S Pozdniakov
- Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia
| | - S Procureur
- CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
| | | | - A J R Puckett
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - X Qian
- Duke University, Durham, North Carolina 27708, USA
| | - Y Qiang
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - G Ricco
- Università di Genova, 16146 Genova, Italy
| | - D Rimal
- Florida International University, Miami, Florida 33199, USA
| | - M Ripani
- INFN, Sezione di Genova, 16146 Genova, Italy
| | - B G Ritchie
- Arizona State University, Tempe, Arizona 85287-1504, USA
| | - I Rodriguez
- Florida International University, Miami, Florida 33199, USA
| | - G Ron
- The Hebrew University of Jerusalem, 91904, Israel
| | - G Rosner
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - P Rossi
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
| | - F Sabatié
- CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
| | - A Saha
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M S Saini
- Florida State University, Tallahassee, Florida 32306, USA
| | - A J Sarty
- Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada
| | - B Sawatzky
- Temple University, Philadelphia, Pennsylvania 19122, USA and University of Virginia, Charlottesville, Virginia 22901, USA
| | - N A Saylor
- Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA
| | - D Schott
- The George Washington University, Washington, D.C. 20052, USA
| | - E Schulte
- Rutgers, The State University of New Jersey, Piscataway, New Jersey 08855, USA
| | - R A Schumacher
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - E Seder
- University of Connecticut, Storrs, Connecticut 06269, USA
| | - H Seraydaryan
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - R Shneor
- Tel Aviv University, Tel Aviv 69978, Israel
| | - G D Smith
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - D Sokhan
- Institut de Physique Nucléaire ORSAY, Orsay 91406, France
| | - N Sparveris
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA and Temple University, Philadelphia, Pennsylvania 19122, USA
| | - S S Stepanyan
- Kyungpook National University, Daegu 702-701, Republic of Korea
| | - S Stepanyan
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - P Stoler
- Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA
| | - R Subedi
- Kent State University, Kent, Ohio 44242, USA
| | - V Sulkosky
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M Taiuti
- Università di Genova, 16146 Genova, Italy
| | - W Tang
- Ohio University, Athens, Ohio 45701, USA
| | - C E Taylor
- Idaho State University, Pocatello, Idaho 83209, USA
| | - S Tkachenko
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - M Ungaro
- Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA and Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Vernarsky
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | | | - H Voskanyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
| | - E Voutier
- LPSC, Université Joseph Fourier, CNRS/IN2P3, INPG, Grenoble, France
| | - N K Walford
- Catholic University of America, Washington, D.C. 20064, USA
| | - Y Wang
- University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - D P Watts
- Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
| | - L B Weinstein
- Old Dominion University, Norfolk, Virginia 23529, USA
| | - D P Weygand
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - B Wojtsekhowski
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - M H Wood
- Canisius College, Buffalo, New York 14208, USA
| | - X Yan
- Kent State University, Kent, Ohio 44242, USA
| | - H Yao
- Temple University, Philadelphia, Pennsylvania 19122, USA
| | - N Zachariou
- University of South Carolina, Columbia, South Carolina 29208, USA
| | - X Zhan
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - J Zhang
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
| | - Z W Zhao
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - X Zheng
- University of Virginia, Charlottesville, Virginia 22901, USA
| | - I Zonta
- INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy
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5
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Bedlinskiy I, Kubarovsky V, Niccolai S, Stoler P, Adhikari KP, Aghasyan M, Amaryan MJ, Anghinolfi M, Avakian H, Baghdasaryan H, Ball J, Baltzell NA, Battaglieri M, Bennett RP, Biselli AS, Bookwalter C, Boiarinov S, Briscoe WJ, Brooks WK, Burkert VD, Carman DS, Celentano A, Chandavar S, Charles G, Contalbrigo M, Crede V, D'Angelo A, Daniel A, Dashyan N, De Vita R, De Sanctis E, Deur A, Djalali C, Doughty D, Dupre R, Egiyan H, El Alaoui A, El Fassi L, Elouadrhiri L, Eugenio P, Fedotov G, Fegan S, Fleming JA, Forest TA, Fradi A, Garçon M, Gevorgyan N, Giovanetti KL, Girod FX, Gohn W, Gothe RW, Graham L, Griffioen KA, Guegan B, Guidal M, Guo L, Hafidi K, Hakobyan H, Hanretty C, Heddle D, Hicks K, Holtrop M, Ilieva Y, Ireland DG, Ishkhanov BS, Isupov EL, Jo HS, Joo K, Keller D, Khandaker M, Khetarpal P, Kim A, Kim W, Klein FJ, Koirala S, Kubarovsky A, Kuhn SE, Kuleshov SV, Kvaltine ND, Livingston K, Lu HY, MacGregor IJD, Mao Y, Markov N, Martinez D, Mayer M, McKinnon B, Meyer CA, Mineeva T, Mirazita M, Mokeev V, Moutarde H, Munevar E, Munoz Camacho C, Nadel-Turonski P, Niculescu G, Niculescu I, Osipenko M, Ostrovidov AI, Pappalardo LL, Paremuzyan R, Park K, Park S, Pasyuk E, Anefalos Pereira S, Phelps E, Pisano S, Pogorelko O, Pozdniakov S, Price JW, Procureur S, Prok Y, Protopopescu D, Puckett AJR, Raue BA, Ricco G, Rimal D, Ripani M, Rosner G, Rossi P, Sabatié F, Saini MS, Salgado C, Saylor N, Schott D, Schumacher RA, Seder E, Seraydaryan H, Sharabian YG, Smith GD, Sober DI, Sokhan D, Stepanyan SS, Stepanyan S, Strauch S, Taiuti M, Tang W, Taylor CE, Tian Y, Tkachenko S, Ungaro M, Vineyard MF, Vlassov A, Voskanyan H, Voutier E, Walford NK, Watts DP, Weinstein LB, Weygand DP, Wood MH, Zachariou N, Zhang J, Zhao ZW, Zonta I. Measurement of exclusive π(0) electroproduction structure functions and their relationship to transverse generalized parton distributions. Phys Rev Lett 2012; 109:112001. [PMID: 23005620 DOI: 10.1103/physrevlett.109.112001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Indexed: 06/01/2023]
Abstract
Exclusive π(0) electroproduction at a beam energy of 5.75 GeV has been measured with the Jefferson Lab CLAS spectrometer. Differential cross sections were measured at more than 1800 kinematic values in Q(2), x(B), t, and ϕ(π), in the Q(2) range from 1.0 to 4.6 GeV(2), -t up to 2 GeV(2), and x(B) from 0.1 to 0.58. Structure functions σ(T)+ϵσ(L), σ(TT), and σ(LT) were extracted as functions of t for each of 17 combinations of Q(2) and x(B). The data were compared directly with two handbag-based calculations including both longitudinal and transversity generalized parton distributions (GPDs). Inclusion of only longitudinal GPDs very strongly underestimates σ(T)+ϵσ(L) and fails to account for σ(TT) and σ(LT), while inclusion of transversity GPDs brings the calculations into substantially better agreement with the data. There is very strong sensitivity to the relative contributions of nucleon helicity-flip and helicity nonflip processes. The results confirm that exclusive π(0) electroproduction offers direct experimental access to the transversity GPDs.
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Affiliation(s)
- I Bedlinskiy
- Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia
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6
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Baillie N, Tkachenko S, Zhang J, Bosted P, Bültmann S, Christy ME, Fenker H, Griffioen KA, Keppel CE, Kuhn SE, Melnitchouk W, Tvaskis V, Adhikari KP, Adikaram D, Aghasyan M, Amaryan MJ, Anghinolfi M, Arrington J, Avakian H, Baghdasaryan H, Battaglieri M, Biselli AS, Branford D, Briscoe WJ, Brooks WK, Burkert VD, Carman DS, Celentano A, Chandavar S, Charles G, Cole PL, Contalbrigo M, Crede V, D'Angelo A, Daniel A, Dashyan N, De Vita R, De Sanctis E, Deur A, Dey B, Djalali C, Dodge G, Domingo J, Doughty D, Dupre R, Dutta D, Ent R, Egiyan H, El Alaoui A, El Fassi L, Elouadrhiri L, Eugenio P, Fedotov G, Fegan S, Fradi A, Gabrielyan MY, Gevorgyan N, Gilfoyle GP, Giovanetti KL, Girod FX, Gohn W, Golovatch E, Gothe RW, Graham L, Guegan B, Guidal M, Guler N, Guo L, Hafidi K, Heddle D, Hicks K, Holtrop M, Hungerford E, Hyde CE, Ilieva Y, Ireland DG, Ispiryan M, Isupov EL, Jawalkar SS, Jo HS, Kalantarians N, Khandaker M, Khetarpal P, Kim A, Kim W, King PM, Klein A, Klein FJ, Klimenko A, Kubarovsky V, Kuleshov SV, Kvaltine ND, Livingston K, Lu HY, MacGregor IJD, Mao Y, Markov N, McKinnon B, Mineeva T, Morrison B, Moutarde H, Munevar E, Nadel-Turonski P, Ni A, Niccolai S, Niculescu I, Niculescu G, Osipenko M, Ostrovidov AI, Pappalardo L, Park K, Park S, Pasyuk E, Anefalos Pereira S, Pisano S, Pozdniakov S, Price JW, Procureur S, Prok Y, Protopopescu D, Raue BA, Ricco G, Rimal D, Ripani M, Rosner G, Rossi P, Sabatié F, Saini MS, Salgado C, Schott D, Schumacher RA, Seder E, Sharabian YG, Sober DI, Sokhan D, Stepanyan S, Stepanyan SS, Stoler P, Strauch S, Taiuti M, Tang W, Ungaro M, Vineyard MF, Voutier E, Watts DP, Weinstein LB, Weygand DP, Wood MH, Zana L, Zhao B. Measurement of the neutron F2 structure function via spectator tagging with CLAS. Phys Rev Lett 2012; 108:142001. [PMID: 22540786 DOI: 10.1103/physrevlett.108.142001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2011] [Indexed: 05/31/2023]
Abstract
We report on the first measurement of the F(2) structure function of the neutron from the semi-inclusive scattering of electrons from deuterium, with low-momentum protons detected in the backward hemisphere. Restricting the momentum of the spectator protons to ≲100 MeV/c and their angles to ≳100° relative to the momentum transfer allows an interpretation of the process in terms of scattering from nearly on-shell neutrons. The F(2)(n) data collected cover the nucleon-resonance and deep-inelastic regions over a wide range of Bjorken x for 0.65<Q(2)<4.52 GeV(2), with uncertainties from nuclear corrections estimated to be less than a few percent. These measurements provide the first determination of the neutron to proton structure function ratio F(2)(n)/F(2)(p) at 0.2≲x≲0.8 with little uncertainty due to nuclear effects.
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Affiliation(s)
- N Baillie
- College of William and Mary, Williamsburg, Virginia 23187, USA
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7
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Keller D, Hicks K, Adhikari KP, Adikaram D, Amaryan MJ, Anghinolfi M, Baghdasaryan H, Ball J, Battaglieri M, Bedlinskiy I, Biselli AS, Bookwalter C, Boiarinov S, Branford D, Briscoe WJ, Brooks WK, Burkert VD, Carman DS, Celentano A, Chandavar S, Cole PL, Contalbrigo M, Crede V, D’Angelo A, Daniel A, Dashyan N, De Vita R, De Sanctis E, Djalali C, Doughty D, Dupre R, El Alaoui A, El Fassi L, Elouadrhiri L, Eugenio P, Fedotov G, Gabrielyan MY, Gevorgyan N, Gilfoyle GP, Giovanetti KL, Gohn W, Golovatch E, Gothe RW, Graham L, Griffioen KA, Guidal M, Guler N, Guo L, Hafidi K, Hakobyan H, Holtrop M, Ilieva Y, Ireland DG, Ishkhanov BS, Isupov EL, Jo HS, Joo K, Khandaker M, Khetarpal P, Kim A, Kim W, Klein FJ, Kubarovsky A, Kubarovsky V, Kuleshov SV, Lu HY, MacGregor IJD, Mao Y, Markov N, Mayer M, McKinnon B, Meyer CA, Mineeva T, Mirazita M, Mokeev V, Moutarde H, Munevar E, Nadel-Turonski P, Nasseripour R, Niccolai S, Niculescu G, Niculescu I, Osipenko M, Ostrovidov AI, Paolone M, Pappalardo L, Paremuzyan R, Park K, Park S, Pasyuk E, Anefalos Pereira S, Pisano S, Pogorelko O, Pozdniakov S, Procureur S, Prok Y, Protopopescu D, Raue BA, Ricco G, Rimal D, Ripani M, Ritchie BG, Rosner G, Rossi P, Sabatié F, Saini MS, Salgado C, Schott D, Schumacher RA, Seraydaryan H, Sharabian YG, Smith ES, Smith GD, Sober DI, Sokhan D, Stepanyan SS, Stepanyan S, Stoler P, Strauch S, Taiuti M, Tang W, Taylor CE, Tkachenko S, Vernarsky B, Vineyard MF, Vlassov AV, Voskanyan H, Voutier E, Watts DP, Wood MH, Zachariou N, Zana L, Zhao B, Zhao ZW. Publisher’s Note: Branching ratio of the electromagnetic decay of theΣ+(1385)Phys. Rev. D85, 052004 (2012). Int J Clin Exp Med 2012. [DOI: 10.1103/physrevd.85.059903] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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8
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Meziane M, Brash EJ, Gilman R, Jones MK, Luo W, Pentchev L, Perdrisat CF, Puckett AJR, Punjabi V, Wesselmann FR, Ahmidouch A, Albayrak I, Aniol KA, Arrington J, Asaturyan A, Ates O, Baghdasaryan H, Benmokhtar F, Bertozzi W, Bimbot L, Bosted P, Boeglin W, Butuceanu C, Carter P, Chernenko S, Christy E, Commisso M, Cornejo JC, Covrig S, Danagoulian S, Daniel A, Davidenko A, Day D, Dhamija S, Dutta D, Ent R, Frullani S, Fenker H, Frlez E, Garibaldi F, Gaskell D, Gilad S, Goncharenko Y, Hafidi K, Hamilton D, Higinbotham DW, Hinton W, Horn T, Hu B, Huang J, Huber GM, Jensen E, Kang H, Keppel C, Khandaker M, King P, Kirillov D, Kohl M, Kravtsov V, Kumbartzki G, Li Y, Mamyan V, Margaziotis DJ, Markowitz P, Marsh A, Matulenko Y, Maxwell J, Mbianda G, Meekins D, Melnik Y, Miller J, Mkrtchyan A, Mkrtchyan H, Moffit B, Moreno O, Mulholland J, Narayan A, Nedev S, Piasetzky E, Pierce W, Piskunov NM, Prok Y, Ransome RD, Razin DS, Reimer PE, Reinhold J, Rondon O, Shabestari M, Shahinyan A, Shestermanov K, Širca S, Sitnik I, Smykov L, Smith G, Solovyev L, Solvignon P, Subedi R, Suleiman R, Tomasi-Gustafsson E, Vasiliev A, Vanderhaeghen M, Veilleux M, Wojtsekhowski BB, Wood S, Ye Z, Zanevsky Y, Zhang X, Zhang Y, Zheng X, Zhu L. Search for effects beyond the born approximation in polarization transfer observables in e(over→)p elastic scattering. Phys Rev Lett 2011; 106:132501. [PMID: 21520982 DOI: 10.1103/physrevlett.106.132501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2010] [Indexed: 05/30/2023]
Abstract
Intensive theoretical and experimental efforts over the past decade have aimed at explaining the discrepancy between data for the proton electric to magnetic form factor ratio, G(E)/G(M), obtained separately from cross section and polarization transfer measurements. One possible explanation for this difference is a two-photon-exchange contribution. In an effort to search for effects beyond the one-photon-exchange or Born approximation, we report measurements of polarization transfer observables in the elastic H(e[over →],e(')p[over →]) reaction for three different beam energies at a Q(2)=2.5 GeV(2), spanning a wide range of the kinematic parameter ε. The ratio R, which equals μ(p)G(E)/G(M) in the Born approximation, is found to be independent of ε at the 1.5% level. The ε dependence of the longitudinal polarization transfer component P(ℓ) shows an enhancement of (2.3±0.6)% relative to the Born approximation at large ε.
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Affiliation(s)
- M Meziane
- The College of William and Mary, Williamsburg, Virginia 23187, USA.
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9
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Avakian H, Bosted P, Burkert VD, Elouadrhiri L, Adhikari KP, Aghasyan M, Amaryan M, Anghinolfi M, Baghdasaryan H, Ball J, Battaglieri M, Bedlinskiy I, Biselli AS, Branford D, Briscoe WJ, Brooks W, Carman DS, Casey L, Cole PL, Collins P, Crabb D, Crede V, D'Angelo A, Daniel A, Dashyan N, De Vita R, De Sanctis E, Deur A, Dey B, Dhamija S, Dickson R, Djalali C, Dodge G, Doughty D, Dupre R, El Alaoui A, Eugenio P, Fegan S, Fersch R, Forest TA, Fradi A, Gabrielyan MY, Gavalian G, Gevorgyan N, Gilfoyle GP, Giovanetti KL, Girod FX, Gohn W, Gothe RW, Griffioen KA, Guidal M, Guler N, Guo L, Hafidi K, Hakobyan H, Hanretty C, Hassall N, Heddle D, Hicks K, Holtrop M, Ilieva Y, Ireland DG, Isupov EL, Jawalkar SS, Jo HS, Joo K, Keller D, Khandaker M, Khetarpal P, Kim W, Klein A, Klein FJ, Konczykowski P, Kubarovsky V, Kuhn SE, Kuleshov SV, Kuznetsov V, Livingston K, Lu HY, Markov N, Mayer M, Martinez D, McAndrew J, McCracken ME, McKinnon B, Meyer CA, Mineeva T, Mirazita M, Mokeev V, Moreno B, Moriya K, Morrison B, Moutarde H, Munevar E, Nadel-Turonski P, Nasseripour R, Niccolai S, Niculescu G, Niculescu I, Niroula MR, Osipenko M, Ostrovidov AI, Paremuzyan R, Park K, Park S, Pasyuk E, Pereira SA, Perrin Y, Pisano S, Pogorelko O, Price JW, Procureur S, Prok Y, Protopopescu D, Raue BA, Ricco G, Ripani M, Rosner G, Rossi P, Sabatié F, Saini MS, Salamanca J, Salgado C, Schumacher RA, Seder E, Seraydaryan H, Sharabian YG, Sober DI, Sokhan D, Stepanyan SS, Stepanyan S, Stoler P, Strauch S, Suleiman R, Taiuti M, Tedeschi DJ, Tkachenko S, Ungaro M, Vernarsky B, Vineyard MF, Voutier E, Watts DP, Weinstein LB, Weygand DP, Wood MH, Zhang J, Zhao B, Zhao ZW. Measurement of single- and double-spin asymmetries in deep inelastic pion electroproduction with a longitudinally polarized target. Phys Rev Lett 2010; 105:262002. [PMID: 21231647 DOI: 10.1103/physrevlett.105.262002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2010] [Indexed: 05/30/2023]
Abstract
We report the first measurement of the transverse momentum dependence of double-spin asymmetries in semi-inclusive production of pions in deep-inelastic scattering off the longitudinally polarized proton. Data have been obtained using a polarized electron beam of 5.7 GeV with the CLAS detector at the Jefferson Lab (JLab). Modulations of single spin asymmetries over the azimuthal angle between lepton scattering and hadron production planes ϕ have been measured over a wide kinematic range in Bjorken x and virtual photon squared four-momentum Q2. A significant nonzero sin2ϕ single spin asymmetry was observed for the first time indicating strong spin-orbit correlations for transversely polarized quarks in the longitudinally polarized proton.
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Affiliation(s)
- H Avakian
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
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10
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Baghdasaryan H, Weinstein LB, Laget JM, Adhikari KP, Aghasyan M, Amarian M, Anghinolfi M, Avakian H, Ball J, Battaglieri M, Bedlinskiy I, Bennett RP, Berman BL, Biselli AS, Bookwalter C, Briscoe WJ, Brooks WK, Bültmann S, Burkert VD, Carman DS, Crede V, D'Angelo A, Daniel A, Dashyan N, De Vita R, De Sanctis E, Deur A, Dey B, Dickson R, Djalali C, Dodge GE, Doughty D, Dupre R, Egiyan H, El Alaoui A, El Fassi L, Eugenio P, Fegan S, Gabrielyan MY, Gilfoyle GP, Giovanetti KL, Gohn W, Gothe RW, Griffioen KA, Guidal M, Guo L, Gyurjyan V, Hakobyan H, Hanretty C, Hyde CE, Hicks K, Holtrop M, Ilieva Y, Ireland DG, Joo K, Keller D, Khandaker M, Khetarpal P, Kim A, Kim W, Klein A, Klein FJ, Konczykowski P, Kubarovsky V, Kuhn SE, Kuleshov SV, Kuznetsov V, Kvaltine ND, Livingston K, Lu HY, Macgregor IJD, Markov N, Mayer M, McAndrew J, McKinnon B, Meyer CA, Mikhailov K, Mokeev V, Moreno B, Moriya K, Morrison B, Moutarde H, Munevar E, Nadel-Turonski P, Nepali C, Niccolai S, Niculescu G, Niculescu I, Osipenko M, Ostrovidov AI, Paremuzyan R, Park K, Park S, Pasyuk E, Pereira SA, Pisano S, Pogorelko O, Pozdniakov S, Price JW, Procureur S, Protopopescu D, Ricco G, Ripani M, Rosner G, Rossi P, Sabatié F, Salgado C, Schumacher RA, Seraydaryan H, Smith GD, Sober DI, Sokhan D, Stepanyan SS, Stepanyan S, Stoler P, Strauch S, Taiuti M, Tang W, Taylor CE, Tedeschi DJ, Ungaro M, Vineyard MF, Voutier E, Watts DP, Weygand DP, Wood MH, Zhao B, Zhao ZW. Tensor correlations measured in 3He(e,e' pp)n. Phys Rev Lett 2010; 105:222501. [PMID: 21231381 DOI: 10.1103/physrevlett.105.222501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Indexed: 05/30/2023]
Abstract
We have measured the 3He(e,e' pp)n reaction at an incident energy of 4.7 GeV over a wide kinematic range. We identified spectator correlated pp and pn nucleon pairs by using kinematic cuts and measured their relative and total momentum distributions. This is the first measurement of the ratio of pp to pn pairs as a function of pair total momentum p(tot). For pair relative momenta between 0.3 and 0.5 GeV/c, the ratio is very small at low p(tot) and rises to approximately 0.5 at large p(tot). This shows the dominance of tensor over central correlations at this relative momentum.
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11
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Puckett AJR, Brash EJ, Jones MK, Luo W, Meziane M, Pentchev L, Perdrisat CF, Punjabi V, Wesselmann FR, Ahmidouch A, Albayrak I, Aniol KA, Arrington J, Asaturyan A, Baghdasaryan H, Benmokhtar F, Bertozzi W, Bimbot L, Bosted P, Boeglin W, Butuceanu C, Carter P, Chernenko S, Christy E, Commisso M, Cornejo JC, Covrig S, Danagoulian S, Daniel A, Davidenko A, Day D, Dhamija S, Dutta D, Ent R, Frullani S, Fenker H, Frlez E, Garibaldi F, Gaskell D, Gilad S, Gilman R, Goncharenko Y, Hafidi K, Hamilton D, Higinbotham DW, Hinton W, Horn T, Hu B, Huang J, Huber GM, Jensen E, Keppel C, Khandaker M, King P, Kirillov D, Kohl M, Kravtsov V, Kumbartzki G, Li Y, Mamyan V, Margaziotis DJ, Marsh A, Matulenko Y, Maxwell J, Mbianda G, Meekins D, Melnik Y, Miller J, Mkrtchyan A, Mkrtchyan H, Moffit B, Moreno O, Mulholland J, Narayan A, Nedev S, Piasetzky E, Pierce W, Piskunov NM, Prok Y, Ransome RD, Razin DS, Reimer P, Reinhold J, Rondon O, Shabestari M, Shahinyan A, Shestermanov K, Sirca S, Sitnik I, Smykov L, Smith G, Solovyev L, Solvignon P, Subedi R, Tomasi-Gustafsson E, Vasiliev A, Veilleux M, Wojtsekhowski BB, Wood S, Ye Z, Zanevsky Y, Zhang X, Zhang Y, Zheng X, Zhu L. Recoil polarization measurements of the proton electromagnetic form factor ratio to Q2 = 8.5 GeV2. Phys Rev Lett 2010; 104:242301. [PMID: 20873943 DOI: 10.1103/physrevlett.104.242301] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Indexed: 05/29/2023]
Abstract
Among the most fundamental observables of nucleon structure, electromagnetic form factors are a crucial benchmark for modern calculations describing the strong interaction dynamics of the nucleon's quark constituents; indeed, recent proton data have attracted intense theoretical interest. In this Letter, we report new measurements of the proton electromagnetic form factor ratio using the recoil polarization method, at momentum transfers Q2=5.2, 6.7, and 8.5 GeV2. By extending the range of Q2 for which G(E)(p) is accurately determined by more than 50%, these measurements will provide significant constraints on models of nucleon structure in the nonperturbative regime.
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Affiliation(s)
- A J R Puckett
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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Egiyan KS, Dashyan NB, Sargsian MM, Strikman MI, Weinstein LB, Adams G, Ambrozewicz P, Anghinolfi M, Asavapibhop B, Asryan G, Avakian H, Baghdasaryan H, Baillie N, Ball JP, Baltzell NA, Batourine V, Battaglieri M, Bedlinskiy I, Bektasoglu M, Bellis M, Benmouna N, Biselli AS, Bonner BE, Bouchigny S, Boiarinov S, Bradford R, Branford D, Brooks WK, Bültmann S, Burkert VD, Bultuceanu C, Calarco JR, Careccia SL, Carman DS, Carnahan B, Chen S, Cole PL, Coltharp P, Corvisiero P, Crabb D, Crannell H, Cummings JP, De Sanctis E, DeVita R, Degtyarenko PV, Denizli H, Dennis L, Dharmawardane KV, Djalali C, Dodge GE, Donnelly J, Doughty D, Dragovitsch P, Dugger M, Dytman S, Dzyubak OP, Egiyan H, Elouadrhiri L, Empl A, Eugenio P, Fatemi R, Fedotov G, Feuerbach RJ, Forest TA, Funsten H, Gavalian G, Gevorgyan NG, Gilfoyle GP, Giovanetti KL, Girod FX, Goetz JT, Golovatch E, Gothe RW, Griffioen KA, Guidal M, Guillo M, Guler N, Guo L, Gyurjyan V, Hadjidakis C, Hardie J, Hersman FW, Hicks K, Hleiqawi I, Holtrop M, Hu J, Huertas M, Hyde-Wright CE, Ilieva Y, Ireland DG, Ishkhanov BS, Ito MM, Jenkins D, Jo HS, Joo K, Juengst HG, Kellie JD, Khandaker M, Kim KY, Kim K, Kim W, Klein A, Klein FJ, Klimenko A, Klusman M, Kramer LH, Kubarovsky V, Kuhn J, Kuhn SE, Kuleshov S, Lachniet J, Laget JM, Langheinrich J, Lawrence D, Lee T, Livingston K, Maximon LC, McAleer S, McKinnon B, McNabb JWC, Mecking BA, Mestayer MD, Meyer CA, Mibe T, Mikhailov K, Minehart R, Mirazita M, Miskimen R, Mokeev V, Morrow SA, Mueller J, Mutchler GS, Nadel-Turonski P, Napolitano J, Nasseripour R, Niccolai S, Niculescu G, Niculescu I, Niczyporuk BB, Niyazov RA, O'Relly GV, Osipenko M, Ostrovidov AI, Park K, Pasyuk E, Peterson C, Pierce J, Pivnyuk N, Pocanic D, Pogorelko O, Polli E, Pozdniakov S, Preedom BM, Price JW, Prok Y, Protopopescu D, Qin LM, Raue BA, Riccardi G, Ricco G, Ripani M, Ritchie BG, Ronchetti F, Rosner G, Rossi P, Rowntree D, Rubin PD, Sabatié F, Salgado C, Santoro JP, Sapunenko V, Schumacher RA, Serov VS, Sharabian YG, Shaw J, Smith ES, Smith LC, Sober DI, Stavinsky A, Stepanyan S, Stokes BE, Stoler P, Strauch S, Suleiman R, Taiuti M, Taylor S, Tedeschi DJ, Thompson R, Tkabladze A, Tkachenko S, Todor L, Tur C, Ungaro M, Vineyard MF, Vlassov AV, Weygand DP, Williams M, Wolin E, Wood MH, Yegneswaran A, Yun J, Zana L, Zhang J. Measurement of two- and three-nucleon short-range correlation probabilities in nuclei. Phys Rev Lett 2006; 96:082501. [PMID: 16606174 DOI: 10.1103/physrevlett.96.082501] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2005] [Indexed: 05/08/2023]
Abstract
The ratios of inclusive electron scattering cross sections of 4He, 12C, and 56Fe to 3He have been measured at 1 < xB <. At Q2 > 1.4 GeV2, the ratios exhibit two separate plateaus, at 1.5 < xB < 2 and at xB > 2.25. This pattern is predicted by models that include 2- and 3-nucleon short-range correlations (SRC). Relative to A = 3, the per-nucleon probabilities of 3-nucleon SRC are 2.3, 3.1, and 4.4 times larger for A = 4, 12, and 56. This is the first measurement of 3-nucleon SRC probabilities in nuclei.
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Affiliation(s)
- K S Egiyan
- Yerevan Physics Institute, Yerevan 375036, Armenia
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