Journal
PHYSICAL REVIEW D
Volume 82, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.82.112008
Keywords
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Funding
- Office of Nuclear Physics in the Office of Science of the Department of Energy
- National Science Foundation
- Renaissance Technologies LLC
- Abilene Christian University Research Council
- Research Foundation of SUNY
- College of Arts and Sciences
- Vanderbilt University (USA)
- Ministry of Education, Culture, Sports, Science, and Technology
- Japan Society for the Promotion of Science (Japan)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (Brazil)
- Natural Science Foundation of China (People's Republic of China)
- Ministry of Education, Youth and Sports (Czech Republic)
- Centre National de la Recherche Scientifique
- Commissariat a l'Energie Atomique
- Institut National de Physique Nucleaire et de Physique des Particules (France)
- Ministry of Industry, Science and Tekhnologies
- Bundesministerium fur Bildung und Forschung
- Deutscher Akademischer Austausch Dienst
- Alexander von Humboldt Stiftung (Germany)
- Hungarian National Science Fund
- OTKA (Hungary)
- Department of Atomic Energy (India)
- Israel Science Foundation (Israel)
- National Research Foundation
- Ministry Education Science and Technology (Korea)
- Ministry of Education and Science
- Russia Academy of Sciences
- Federal Agency of Atomic Energy (Russia)
- VR
- Wallenberg Foundation (Sweden)
- U.S. Civilian Research and Development Foundation for the Independent States of the Former Soviet Union
- US-Hungarian Fulbright Foundation for Educational Exchange
- US-Israel Binational Science Foundation
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We report the first measurement of transverse single-spin asymmetries in J/psi production from transversely polarized p + p collisions at root s = 200 GeV with data taken by the PHENIX experiment in 2006 and 2008. The measurement was performed over the rapidity ranges 1.2 < vertical bar y vertical bar < 2.2 and vertical bar y vertical bar < 0.35 for transverse momenta up to 6 GeV/c. J/psi production at the Relativistic Heavy Ion Collider is dominated by processes involving initial-state gluons, and transverse single-spin asymmetries of the J/psi can provide access to gluon dynamics within the nucleon. Such asymmetries may also shed light on the long-standing question in QCD of the J/psi production mechanism. Asymmetries were obtained as a function of J/psi transverse momentum and Feynman-x, with a value of -0.086 +/- 0.026(stat) +/- 0.003(syst) in the forward region. This result suggests possible nonzero trigluon correlation functions in transversely polarized protons and, if well defined in this reaction, a nonzero gluon Sivers distribution function.
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