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Beam-Target Helicity Asymmetry for γ[over →]n[over →]→π
Ho, D; Peng, P; Bass, C; Collins, P; D'Angelo, A; Deur, A; Fleming, J; Hanretty, C; Kageya, T; Khandaker, M; Klein, F J; Klempt, E; Laine, V; Lowry, M M; Lu, H; Nepali, C; Nikonov, V A; O'Connell, T; Sandorfi, A M; Sarantsev, A V; Schumacher, R A; Strakovsky, I I; Svarc, A; Walford, N K; Wei, X; Whisnant, C S; Workman, R L; Zonta, I; Adhikari, K P; Adikaram, D; Akbar, Z; Amaryan, M J; Anefalos Pereira, S; Avakian, H; Ball, J; Bashkanov, M; Battaglieri, M; Batourine, V; Bedlinskiy, I; Biselli, A; Briscoe, W J; Burkert, V D; Carman, D S; Celentano, A; Charles, G; Chetry, T; Ciullo, G; Clark, L; Colaneri, L; Cole, P L.
Affiliation
  • Ho D; Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
  • Peng P; University of Virginia, Charlottesville, Virginia 22903, USA.
  • Bass C; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Collins P; Catholic University of America, Washington, D.C. 20064, USA.
  • D'Angelo A; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Deur A; Università di Roma "Tor Vergata" and INFN Sezione di Roma2, 00133 Roma, Italy.
  • Fleming J; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Hanretty C; Edinburgh University, Edinburgh EH9 3FD, United Kingdom.
  • Kageya T; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Khandaker M; University of Virginia, Charlottesville, Virginia 22903, USA.
  • Klein FJ; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Klempt E; Norfolk State University, Norfolk, Virginia 23504, USA.
  • Laine V; The George Washington University, Washington, D.C. 20052, USA.
  • Lowry MM; Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53113 Bonn, Germany.
  • Lu H; Université Blaise Pascal, Clermont-Ferrand, Aubière Cedex 63178 , France.
  • Nepali C; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Nikonov VA; Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
  • O'Connell T; University of Iowa, Iowa City, Iowa 52242, USA.
  • Sandorfi AM; Old Dominion University, Norfolk, Virginia 23529, USA.
  • Sarantsev AV; Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53113 Bonn, Germany.
  • Schumacher RA; Petersburg Nuclear Physics Institute, Gatchina 188300, Russia.
  • Strakovsky II; University of Connecticut, Storrs, Connecticut 06269, USA.
  • Svarc A; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Walford NK; Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53113 Bonn, Germany.
  • Wei X; Petersburg Nuclear Physics Institute, Gatchina 188300, Russia.
  • Whisnant CS; Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
  • Workman RL; The George Washington University, Washington, D.C. 20052, USA.
  • Zonta I; Rudjer Boskovic Institute, Zagreb 10002, Croatia.
  • Adhikari KP; Catholic University of America, Washington, D.C. 20064, USA.
  • Adikaram D; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Akbar Z; James Madison University, Harrisonburg, Virginia 22807, USA.
  • Amaryan MJ; The George Washington University, Washington, D.C. 20052, USA.
  • Anefalos Pereira S; Università di Roma "Tor Vergata" and INFN Sezione di Roma2, 00133 Roma, Italy.
  • Avakian H; Old Dominion University, Norfolk, Virginia 23529, USA.
  • Ball J; Mississippi State University, Mississippi State, Mississippi 39762, USA.
  • Bashkanov M; Old Dominion University, Norfolk, Virginia 23529, USA.
  • Battaglieri M; Florida State University, Tallahassee, Florida 32306, USA.
  • Batourine V; Old Dominion University, Norfolk, Virginia 23529, USA.
  • Bedlinskiy I; INFN, Laboratori Nazionali di Frascati, Frascati 00044, Italy.
  • Biselli A; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Briscoe WJ; Irfu/SPhN, CEA, Université Paris-Saclay, Gif-sur-Yvette 91191 , France.
  • Burkert VD; Edinburgh University, Edinburgh EH9 3FD, United Kingdom.
  • Carman DS; INFN, Sezione di Genova, Genova 16146, Italy.
  • Celentano A; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Charles G; Institute of Theoretical and Experimental Physics, Moscow 117259, Russia.
  • Chetry T; Fairfield University, Fairfield, Connecticut 06824, USA.
  • Ciullo G; The George Washington University, Washington, D.C. 20052, USA.
  • Clark L; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Colaneri L; Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
  • Cole PL; INFN, Sezione di Genova, Genova 16146, Italy.
Phys Rev Lett ; 118(24): 242002, 2017 Jun 16.
Article in En | MEDLINE | ID: mdl-28665642
ABSTRACT
We report the first beam-target double-polarization asymmetries in the γ+n(p)→π^{-}+p(p) reaction spanning the nucleon resonance region from invariant mass W=1500 to 2300 MeV. Circularly polarized photons and longitudinally polarized deuterons in solid hydrogen deuteride (HD) have been used with the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. The exclusive final state has been extracted using three very different analyses that show excellent agreement, and these have been used to deduce the E polarization observable for an effective neutron target. These results have been incorporated into new partial wave analyses and have led to significant revisions for several γnN^{*} resonance photocouplings.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2017 Document type: Article Affiliation country: United States
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2017 Document type: Article Affiliation country: United States