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Nuclear Dependence of the Transverse-Single-Spin Asymmetry for Forward Neutron Production in Polarized p+A Collisions at sqrt[s_{NN}]=200 GeV.
Aidala, C; Akiba, Y; Alfred, M; Andrieux, V; Aoki, K; Apadula, N; Asano, H; Ayuso, C; Azmoun, B; Babintsev, V; Bagoly, A; Bandara, N S; Barish, K N; Bathe, S; Bazilevsky, A; Beaumier, M; Belmont, R; Berdnikov, A; Berdnikov, Y; Blau, D S; Boer, M; Bok, J S; Brooks, M L; Bryslawskyj, J; Bumazhnov, V; Butler, C; Campbell, S; Canoa Roman, V; Cervantes, R; Chi, C Y; Chiu, M; Choi, I J; Choi, J B; Citron, Z; Connors, M; Cronin, N; Csanád, M; Csörgo, T; Danley, T W; Daugherity, M S; David, G; DeBlasio, K; Dehmelt, K; Denisov, A; Deshpande, A; Desmond, E J; Dion, A; Dixit, D; Do, J H; Drees, A.
Affiliation
  • Aidala C; Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040, USA.
  • Akiba Y; RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan.
  • Alfred M; RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
  • Andrieux V; Department of Physics and Astronomy, Howard University, Washington, DC 20059, USA.
  • Aoki K; Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040, USA.
  • Apadula N; KEK, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan.
  • Asano H; Iowa State University, Ames, Iowa 50011, USA.
  • Ayuso C; Kyoto University, Kyoto 606-8502, Japan.
  • Azmoun B; RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan.
  • Babintsev V; Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040, USA.
  • Bagoly A; Physics Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
  • Bandara NS; IHEP Protvino, State Research Center of Russian Federation, Institute for High Energy Physics, Protvino 142281, Russia.
  • Barish KN; ELTE, Eötvös Loránd University, H-1117 Budapest, Pázmány P. s. 1/A, Hungary.
  • Bathe S; Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003-9337, USA.
  • Bazilevsky A; University of California-Riverside, Riverside, California 92521, USA.
  • Beaumier M; Baruch College, City University of New York, New York, New York 10010, USA.
  • Belmont R; RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
  • Berdnikov A; Physics Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
  • Berdnikov Y; University of California-Riverside, Riverside, California 92521, USA.
  • Blau DS; University of Colorado, Boulder, Colorado 80309, USA.
  • Boer M; Saint Petersburg State Polytechnic University, St. Petersburg 195251 Russia.
  • Bok JS; Saint Petersburg State Polytechnic University, St. Petersburg 195251 Russia.
  • Brooks ML; National Research Center "Kurchatov Institute," Moscow 123098 Russia.
  • Bryslawskyj J; National Research Nuclear University, MEPhI, Moscow Engineering Physics Institute, Moscow 115409, Russia.
  • Bumazhnov V; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Butler C; New Mexico State University, Las Cruces, New Mexico 88003, USA.
  • Campbell S; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Canoa Roman V; Baruch College, City University of New York, New York, New York 10010, USA.
  • Cervantes R; University of California-Riverside, Riverside, California 92521, USA.
  • Chi CY; IHEP Protvino, State Research Center of Russian Federation, Institute for High Energy Physics, Protvino 142281, Russia.
  • Chiu M; Georgia State University, Atlanta, Georgia 30303, USA.
  • Choi IJ; Columbia University, New York, New York 10027, USA and Nevis Laboratories, Irvington, New York 10533, USA.
  • Choi JB; Department of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794-3800, USA.
  • Citron Z; Department of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794-3800, USA.
  • Connors M; Columbia University, New York, New York 10027, USA and Nevis Laboratories, Irvington, New York 10533, USA.
  • Cronin N; Physics Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
  • Csanád M; University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
  • Csörgo T; Chonbuk National University, Jeonju 561-756, Korea.
  • Danley TW; Weizmann Institute, Rehovot 76100, Israel.
  • Daugherity MS; Georgia State University, Atlanta, Georgia 30303, USA.
  • David G; RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
  • DeBlasio K; Department of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794-3800, USA.
  • Dehmelt K; ELTE, Eötvös Loránd University, H-1117 Budapest, Pázmány P. s. 1/A, Hungary.
  • Denisov A; Eszterházy Károly University, Károly Róbert Campus, H-3200 Gyöngyös, Mátrai út 36, Hungary.
  • Deshpande A; Institute for Particle and Nuclear Physics, Wigner Research Centre for Physics, Hungarian Academy of Sciences (Wigner RCP, RMKI) H-1525 Budapest 114, P.O. Box 49, Budapest, Hungary.
  • Desmond EJ; Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA.
  • Dion A; Abilene Christian University, Abilene, Texas 79699, USA.
  • Dixit D; Physics Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
  • Do JH; Department of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794-3800, USA.
  • Drees A; University of New Mexico, Albuquerque, New Mexico 87131, USA.
Phys Rev Lett ; 120(2): 022001, 2018 Jan 12.
Article in En | MEDLINE | ID: mdl-29376675
During 2015, the Relativistic Heavy Ion Collider (RHIC) provided collisions of transversely polarized protons with Au and Al nuclei for the first time, enabling the exploration of transverse-single-spin asymmetries with heavy nuclei. Large single-spin asymmetries in very forward neutron production have been previously observed in transversely polarized p+p collisions at RHIC, and the existing theoretical framework that was successful in describing the single-spin asymmetry in p+p collisions predicts only a moderate atomic-mass-number (A) dependence. In contrast, the asymmetries observed at RHIC in p+A collisions showed a surprisingly strong A dependence in inclusive forward neutron production. The observed asymmetry in p+Al collisions is much smaller, while the asymmetry in p+Au collisions is a factor of 3 larger in absolute value and of opposite sign. The interplay of different neutron production mechanisms is discussed as a possible explanation of the observed A dependence.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Phys Rev Lett Year: 2018 Document type: Article Affiliation country: United States Country of publication: United States
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Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Prognostic_studies Language: En Journal: Phys Rev Lett Year: 2018 Document type: Article Affiliation country: United States Country of publication: United States