1
|
Almazán H, Andriamirado M, Balantekin AB, Band HR, Bass CD, Bergeron DE, Bernard L, Blanchet A, Bonhomme A, Bowden NS, Bryan CD, Buck C, Classen T, Conant AJ, Deichert G, Del Amo Sanchez P, Delgado A, Diwan MV, Dolinski MJ, El Atmani I, Erickson A, Foust BT, Gaison JK, Galindo-Uribarri A, Gilbert CE, Hans S, Hansell AB, Heeger KM, Heffron B, Jaffe DE, Jayakumar S, Ji X, Jones DC, Koblanski J, Kyzylova O, Labit L, Lamblin J, Lane CE, Langford TJ, LaRosa J, Letourneau A, Lhuillier D, Licciardi M, Lindner M, Littlejohn BR, Lu X, Maricic J, Materna T, Mendenhall MP, Meyer AM, Milincic R, Mueller PE, Mumm HP, Napolitano J, Neilson R, Nikkel JA, Nour S, Palomino JL, Pessard H, Pushin DA, Qian X, Réal JS, Ricol JS, Roca C, Rogly R, Rosero R, Salagnac T, Savu V, Schoppmann S, Searles M, Sergeyeva V, Soldner T, Stutz A, Surukuchi PT, Tyra MA, Varner RL, Venegas-Vargas D, Vialat M, Weatherly PB, White C, Wilhelmi J, Woolverton A, Yeh M, Zhang C, Zhang X. Joint Measurement of the ^{235}U Antineutrino Spectrum by PROSPECT and STEREO. Phys Rev Lett 2022; 128:081802. [PMID: 35275665 DOI: 10.1103/physrevlett.128.081802] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 12/23/2021] [Indexed: 06/14/2023]
Abstract
The PROSPECT and STEREO collaborations present a combined measurement of the pure ^{235}U antineutrino spectrum, without site specific corrections or detector-dependent effects. The spectral measurements of the two highest precision experiments at research reactors are found to be compatible with χ^{2}/ndf=24.1/21, allowing a joint unfolding of the prompt energy measurements into antineutrino energy. This ν[over ¯]_{e} energy spectrum is provided to the community, and an excess of events relative to the Huber model is found in the 5-6 MeV region. When a Gaussian bump is fitted to the excess, the data-model χ^{2} value is improved, corresponding to a 2.4σ significance.
Collapse
Affiliation(s)
- H Almazán
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - M Andriamirado
- Department of Physics, Illinois Institute of Technology, Chicago, Illinois, USA
| | - A B Balantekin
- Department of Physics, University of Wisconsin, Madison, Wisconsin, USA
| | - H R Band
- Wright Laboratory, Department of Physics, Yale University, New Haven, Connecticut, USA
| | - C D Bass
- Department of Physics, Le Moyne College, Syracuse, New York, USA
| | - D E Bergeron
- National Institute of Standards and Technology, Gaithersburg, Maryland, USA
| | - L Bernard
- University Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - A Blanchet
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - A Bonhomme
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - N S Bowden
- Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California, USA
| | - C D Bryan
- High Flux Isotope Reactor, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
| | - C Buck
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - T Classen
- Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California, USA
| | - A J Conant
- High Flux Isotope Reactor, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
| | - G Deichert
- High Flux Isotope Reactor, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
| | | | - A Delgado
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee, USA
| | - M V Diwan
- Brookhaven National Laboratory, Upton, New York, USA
| | - M J Dolinski
- Department of Physics, Drexel University, Philadelphia, Pennsylvania, USA
| | - I El Atmani
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - A Erickson
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia USA
| | - B T Foust
- Wright Laboratory, Department of Physics, Yale University, New Haven, Connecticut, USA
| | - J K Gaison
- Wright Laboratory, Department of Physics, Yale University, New Haven, Connecticut, USA
| | - A Galindo-Uribarri
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee, USA
| | - C E Gilbert
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee, USA
| | - S Hans
- Brookhaven National Laboratory, Upton, New York, USA
| | - A B Hansell
- Department of Physics, Temple University, Philadelphia, Pennsylvania, USA
| | - K M Heeger
- Wright Laboratory, Department of Physics, Yale University, New Haven, Connecticut, USA
| | - B Heffron
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee, USA
| | - D E Jaffe
- Brookhaven National Laboratory, Upton, New York, USA
| | - S Jayakumar
- Department of Physics, Drexel University, Philadelphia, Pennsylvania, USA
| | - X Ji
- Brookhaven National Laboratory, Upton, New York, USA
| | - D C Jones
- Department of Physics, Temple University, Philadelphia, Pennsylvania, USA
| | - J Koblanski
- Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii, USA
| | - O Kyzylova
- Department of Physics, Drexel University, Philadelphia, Pennsylvania, USA
| | - L Labit
- Univ. Savoie Mont Blanc, CNRS, LAPP-IN2P3, 74000 Annecy, France
| | - J Lamblin
- University Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - C E Lane
- Department of Physics, Drexel University, Philadelphia, Pennsylvania, USA
| | - T J Langford
- Wright Laboratory, Department of Physics, Yale University, New Haven, Connecticut, USA
| | - J LaRosa
- National Institute of Standards and Technology, Gaithersburg, Maryland, USA
| | - A Letourneau
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - D Lhuillier
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - M Licciardi
- University Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - M Lindner
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - B R Littlejohn
- Department of Physics, Illinois Institute of Technology, Chicago, Illinois, USA
| | - X Lu
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee, USA
| | - J Maricic
- Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii, USA
| | - T Materna
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - M P Mendenhall
- Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California, USA
| | - A M Meyer
- Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii, USA
| | - R Milincic
- Department of Physics and Astronomy, University of Hawaii, Honolulu, Hawaii, USA
| | - P E Mueller
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
| | - H P Mumm
- National Institute of Standards and Technology, Gaithersburg, Maryland, USA
| | - J Napolitano
- Department of Physics, Temple University, Philadelphia, Pennsylvania, USA
| | - R Neilson
- Department of Physics, Drexel University, Philadelphia, Pennsylvania, USA
| | - J A Nikkel
- Wright Laboratory, Department of Physics, Yale University, New Haven, Connecticut, USA
| | - S Nour
- National Institute of Standards and Technology, Gaithersburg, Maryland, USA
| | - J L Palomino
- Department of Physics, Illinois Institute of Technology, Chicago, Illinois, USA
| | - H Pessard
- Univ. Savoie Mont Blanc, CNRS, LAPP-IN2P3, 74000 Annecy, France
| | - D A Pushin
- Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario, Canada
| | - X Qian
- Brookhaven National Laboratory, Upton, New York, USA
| | - J-S Réal
- University Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - J-S Ricol
- University Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - C Roca
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - R Rogly
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - R Rosero
- Brookhaven National Laboratory, Upton, New York, USA
| | - T Salagnac
- University Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - V Savu
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - S Schoppmann
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - M Searles
- High Flux Isotope Reactor, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
| | - V Sergeyeva
- Univ. Savoie Mont Blanc, CNRS, LAPP-IN2P3, 74000 Annecy, France
| | - T Soldner
- Institut Laue-Langevin, CS 20156, 38042 Grenoble Cedex 9, France
| | - A Stutz
- University Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - P T Surukuchi
- Wright Laboratory, Department of Physics, Yale University, New Haven, Connecticut, USA
| | - M A Tyra
- National Institute of Standards and Technology, Gaithersburg, Maryland, USA
| | - R L Varner
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
| | - D Venegas-Vargas
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee, USA
| | - M Vialat
- Institut Laue-Langevin, CS 20156, 38042 Grenoble Cedex 9, France
| | - P B Weatherly
- Department of Physics, Drexel University, Philadelphia, Pennsylvania, USA
| | - C White
- Department of Physics, Illinois Institute of Technology, Chicago, Illinois, USA
| | - J Wilhelmi
- Wright Laboratory, Department of Physics, Yale University, New Haven, Connecticut, USA
| | - A Woolverton
- Institute for Quantum Computing and Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario, Canada
| | - M Yeh
- Brookhaven National Laboratory, Upton, New York, USA
| | - C Zhang
- Brookhaven National Laboratory, Upton, New York, USA
| | - X Zhang
- Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, California, USA
| |
Collapse
|
2
|
Almazán H, Bernard L, Blanchet A, Bonhomme A, Buck C, Sanchez PDA, Atmani IE, Haser J, Labit L, Lamblin J, Letourneau A, Lhuillier D, Licciardi M, Lindner M, Materna T, Minotti A, Onillon A, Pessard H, Réal JS, Roca C, Rogly R, Salagnac T, Savu V, Schoppmann S, Sergeyeva V, Soldner T, Stutz A, Vialat M. Accurate Measurement of the Electron Antineutrino Yield of ^{235}U Fissions from the STEREO Experiment with 119 Days of Reactor-On Data. Phys Rev Lett 2020; 125:201801. [PMID: 33258621 DOI: 10.1103/physrevlett.125.201801] [Citation(s) in RCA: 2] [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: 04/09/2020] [Revised: 08/06/2020] [Accepted: 09/28/2020] [Indexed: 06/12/2023]
Abstract
We report a measurement of the antineutrino rate from the fission of ^{235}U with the STEREO detector using 119 days of reactor turned on. In our analysis, we perform several detailed corrections and achieve the most precise single measurement at reactors with highly enriched ^{235}U fuel. We measure an IBD cross section per fission of σ_{f}=(6.34±0.06[stat]±0.15[sys]±0.15[model])×10^{-43} cm^{2}/fission and observe a rate deficit of (5.2±0.8[stat]±2.3[sys]±2.3[model])% compared to the model, consistent with the deficit of the world average. Testing ^{235}U as the sole source of the deficit, we find a tension between the results of lowly and highly enriched ^{235}U fuel of 2.1 standard deviations.
Collapse
Affiliation(s)
- H Almazán
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - L Bernard
- Université Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - A Blanchet
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - A Bonhomme
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - C Buck
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - P Del Amo Sanchez
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS/IN2P3, LAPP, 74000 Annecy, France
| | - I El Atmani
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - J Haser
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - L Labit
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS/IN2P3, LAPP, 74000 Annecy, France
| | - J Lamblin
- Université Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - A Letourneau
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - D Lhuillier
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - M Licciardi
- Université Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - M Lindner
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - T Materna
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - A Minotti
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - A Onillon
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - H Pessard
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS/IN2P3, LAPP, 74000 Annecy, France
| | - J-S Réal
- Université Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - C Roca
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - R Rogly
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - T Salagnac
- Université Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - V Savu
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - S Schoppmann
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - V Sergeyeva
- Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS/IN2P3, LAPP, 74000 Annecy, France
| | - T Soldner
- Institut Laue-Langevin, CS 20156, 38042 Grenoble Cedex 9, France
| | - A Stutz
- Université Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - M Vialat
- Institut Laue-Langevin, CS 20156, 38042 Grenoble Cedex 9, France
| |
Collapse
|
4
|
Almazán H, Sanchez PDA, Bernard L, Blanchet A, Bonhomme A, Buck C, Favier J, Haser J, Hélaine V, Kandzia F, Kox S, Lamblin J, Letourneau A, Lhuillier D, Lindner M, Manzanillas L, Materna T, Minotti A, Montanet F, Pessard H, Real JS, Roca C, Salagnac T, Schoppmann S, Sergeyeva V, Soldner T, Stutz A, Zsoldos S. Sterile Neutrino Constraints from the STEREO Experiment with 66 Days of Reactor-On Data. Phys Rev Lett 2018; 121:161801. [PMID: 30387650 DOI: 10.1103/physrevlett.121.161801] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 08/14/2018] [Indexed: 06/08/2023]
Abstract
The reactor antineutrino anomaly might be explained by the oscillation of reactor antineutrinos toward a sterile neutrino of eV mass. In order to explore this hypothesis, the STEREO experiment measures the antineutrino energy spectrum in six different detector cells covering baselines between 9 and 11 m from the compact core of the ILL research reactor. In this Letter, results from 66 days of reactor turned on and 138 days of reactor turned off are reported. A novel method to extract the antineutrino rates has been developed based on the distribution of the pulse shape discrimination parameter. The test of a new oscillation toward a sterile neutrino is performed by comparing ratios of cells, independent of absolute normalization and of the prediction of the reactor spectrum. The results are found to be compatible with the null oscillation hypothesis and the best fit of the reactor antineutrino anomaly is excluded at 97.5% C.L.
Collapse
Affiliation(s)
- H Almazán
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - P Del Amo Sanchez
- Univ. Grenoble Alpes, Université Savoie Mont Blanc, CNRS/IN2P3, LAPP, 74000 Annecy, France
| | - L Bernard
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - A Blanchet
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - A Bonhomme
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - C Buck
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - J Favier
- Univ. Grenoble Alpes, Université Savoie Mont Blanc, CNRS/IN2P3, LAPP, 74000 Annecy, France
| | - J Haser
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - V Hélaine
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - F Kandzia
- Institut Laue-Langevin, CS 20156, 38042 Grenoble Cedex 9, France
| | - S Kox
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - J Lamblin
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - A Letourneau
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - D Lhuillier
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - M Lindner
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - L Manzanillas
- Univ. Grenoble Alpes, Université Savoie Mont Blanc, CNRS/IN2P3, LAPP, 74000 Annecy, France
| | - T Materna
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - A Minotti
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - F Montanet
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - H Pessard
- Univ. Grenoble Alpes, Université Savoie Mont Blanc, CNRS/IN2P3, LAPP, 74000 Annecy, France
| | - J-S Real
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - C Roca
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - T Salagnac
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - S Schoppmann
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - V Sergeyeva
- Univ. Grenoble Alpes, Université Savoie Mont Blanc, CNRS/IN2P3, LAPP, 74000 Annecy, France
| | - T Soldner
- Institut Laue-Langevin, CS 20156, 38042 Grenoble Cedex 9, France
| | - A Stutz
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| | - S Zsoldos
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LPSC-IN2P3, 38000 Grenoble, France
| |
Collapse
|