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Form Factors and Two-Photon Exchange in High-Energy Elastic Electron-Proton Scattering.
Christy, M E; Gautam, T; Ou, L; Schmookler, B; Wang, Y; Adikaram, D; Ahmed, Z; Albataineh, H; Ali, S F; Aljawrneh, B; Allada, K; Allison, S L; Alsalmi, S; Androic, D; Aniol, K; Annand, J; Arrington, J; Atac, H; Averett, T; Ayerbe Gayoso, C; Bai, X; Bane, J; Barcus, S; Bartlett, K; Bellini, V; Beminiwattha, R; Bericic, J; Bhatt, H; Bhetuwal, D; Biswas, D; Brash, E; Bulumulla, D; Camacho, C M; Campbell, J; Camsonne, A; Carmignotto, M; Castellanos, J; Chen, C; Chen, J-P; Chetry, T; Cisbani, E; Clary, B; Cohen, E; Compton, N; Cornejo, J C; Covrig Dusa, S; Crowe, B; Danagoulian, S; Danley, T; Deconinck, W.
Afiliación
  • Christy ME; Hampton University, Hampton, Virginia 23669, USA.
  • Gautam T; Hampton University, Hampton, Virginia 23669, USA.
  • Ou L; Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
  • Schmookler B; Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
  • Wang Y; William and Mary, Williamsburg, Virginia 23185, USA.
  • Adikaram D; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Ahmed Z; University of Regina, Regina, Saskatchewan S4S 0A2 Canada.
  • Albataineh H; Texas A & M University, Kingsville, Texas 77843, USA.
  • Ali SF; Catholic University of America, Washington, District of Columbia 20064, USA.
  • Aljawrneh B; North Carolina A&T State University, Greensboro, North Carolina 27411, USA.
  • Allada K; Al Zaytoonah University of Jordan, Amman 11733, Jordan.
  • Allison SL; Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
  • Alsalmi S; Old Dominion University, Norfolk, Virginia 23529, USA.
  • Androic D; Kent State University, Kent, Ohio 44240, USA.
  • Aniol K; University of Zagreb, Trg Republike Hrvatske 14, 10000, Zagreb, Croatia.
  • Annand J; California State University, Los Angeles, Los Angeles, California 90032, USA.
  • Arrington J; SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
  • Atac H; Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
  • Averett T; Argonne National Laboratory, Lemont, Illinois 60439, USA.
  • Ayerbe Gayoso C; Temple University, Philadelphia, Pennsylvania 19122, USA.
  • Bai X; William and Mary, Williamsburg, Virginia 23185, USA.
  • Bane J; William and Mary, Williamsburg, Virginia 23185, USA.
  • Barcus S; University of Virginia, Charlottesville, Virginia 232904, USA.
  • Bartlett K; University of Tennessee, Knoxville, Tennessee 37996, USA.
  • Bellini V; William and Mary, Williamsburg, Virginia 23185, USA.
  • Beminiwattha R; William and Mary, Williamsburg, Virginia 23185, USA.
  • Bericic J; Istituto Nazionale di Fisica Nucleare, Department of Physics and Astronomy, I-95123 Catania, Italy.
  • Bhatt H; Syracuse University, Syracuse, New York, 13244, USA.
  • Bhetuwal D; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Biswas D; Mississippi State University, Mississippi State, Mississippi 39762, USA.
  • Brash E; Mississippi State University, Mississippi State, Mississippi 39762, USA.
  • Bulumulla D; Hampton University, Hampton, Virginia 23669, USA.
  • Camacho CM; Christopher Newport University, Newport News, Virginia 23606, USA.
  • Campbell J; Old Dominion University, Norfolk, Virginia 23529, USA.
  • Camsonne A; Institut de Physique Nucleaire, 15 Rue Georges Clemenceau, 91400 Orsay, France.
  • Carmignotto M; Dalhousie University, Nova Scotia NS B3H 4R2, Canada.
  • Castellanos J; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Chen C; Catholic University of America, Washington, DC 20064, USA.
  • Chen JP; Florida International University, Miami, Florida 33199, USA.
  • Chetry T; Hampton University, Hampton, Virginia 23669, USA.
  • Cisbani E; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Clary B; Ohio University, Athens, Ohio 45701, USA.
  • Cohen E; Istituto Nazionale di Fisica Nucleare - Sezione di Roma, P.le Aldo Moro, 2 - 00185 Roma, Italy.
  • Compton N; University of Connecticut, Storrs, Connecticut 06269, USA.
  • Cornejo JC; Tel Aviv University, Tel Aviv-Yafo 69978, Israel.
  • Covrig Dusa S; Ohio University, Athens, Ohio 45701, USA.
  • Crowe B; William and Mary, Williamsburg, Virginia 23185, USA.
  • Danagoulian S; Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
  • Danley T; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Deconinck W; North Carolina Central University, Durham, North Carolina 27707, USA.
Phys Rev Lett ; 128(10): 102002, 2022 Mar 11.
Article en En | MEDLINE | ID: mdl-35333083
ABSTRACT
We present new precision measurements of the elastic electron-proton scattering cross section for momentum transfer (Q^{2}) up to 15.75 (GeV/c)^{2}. Combined with existing data, these provide an improved extraction of the proton magnetic form factor at high Q^{2} and double the range over which a longitudinal or transverse separation of the cross section can be performed. The difference between our results and polarization data agrees with that observed at lower Q^{2} and attributed to hard two-photon exchange (TPE) effects, extending to 8 (GeV/c)^{2} the range of Q^{2} for which a discrepancy is established at >95% confidence. We use the discrepancy to quantify the size of TPE contributions needed to explain the cross section at high Q^{2}.
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Texto completo: 1 Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2022 Tipo del documento: Article
Texto completo
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Texto completo: 1 Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2022 Tipo del documento: Article