Single-spin asymmetry of $J/\psi$ production in $p+p$, $p+$Al, and $p+$Au collisions with transversely polarized proton beams at $\sqrt{s_{_{NN}}}=200$ GeV

C. Aidala , Y. Akiba , M. Alfred , V. Andrieux , N. Apadula , H. Asano , B. Azmoun , V. Babintsev , A. Bagoly , N.S. Bandara , K.N. Barish , S. Bathe , A. Bazilevsky , M. Beaumier , R. Belmont , A. Berdnikov , Y. Berdnikov , D.S. Blau , M. Boer , J.S. Bok , M.L. Brooks , J. Bryslawskyj , V. Bumazhnov , S. Campbell , V. Canoa Roman , R. Cervantes , C.Y. Chi , M. Chiu , I.J. Choi , J.B. Choi , Z. Citron , M. Connors , N. Cronin , M. Csanád , T. Csörgő , T.W. Danley , M.S. Daugherity , G. David , K. Deblasio , K. Dehmelt , A. Denisov , A. Deshpande , E.J. Desmond , A. Dion , D. Dixit , J.H. Do , A. Drees , K.A. Drees , J.M. Durham , A. Durum , A. Enokizono , H. En'Yo , S. Esumi , B. Fadem , W. Fan , N. Feege , D.E. Fields , M. Finger , S.L. Fokin , J.E. Frantz , A. Franz , A.D. Frawley , Y. Fukuda , C. Gal , P. Gallus , P. Garg , H. Ge , F. Giordano , Y. Goto , N. Grau , S.V. Greene , M. Grosse Perdekamp , T. Gunji , H. Guragain , T. Hachiya , J.S. Haggerty , K.I. Hahn , H. Hamagaki , H.F. Hamilton , S.Y. Han , J. Hanks , S. Hasegawa , T.O.S. Haseler , X. He , T.K. Hemmick , J.C. Hill , K. Hill , A. Hodges , R.S. Hollis , K. Homma , B. Hong , T. Hoshino , N. Hotvedt , J. Huang , S. Huang , K. Imai , M. Inaba , A. Iordanova , D. Isenhower , D. Ivanishchev , B.V. Jacak , M. Jezghani , Z. Ji , X. Jiang , B.M. Johnson , D. Jouan (1) , D.S. Jumper , J.H. Kang , D. Kapukchyan , S. Karthas , D. Kawall , A.V. Kazantsev , V. Khachatryan , A. Khanzadeev , C. Kim , E.-J. Kim , M. Kim , D. Kincses , E. Kistenev , J. Klatsky , P. Kline , T. Koblesky , D. Kotov , S. Kudo , K. Kurita , Y. Kwon , J.G. Lajoie , A. Lebedev , S.H. Lee , M.J. Leitch , Y.H. Leung , N.A. Lewis , X. Li , S.H. Lim , M.X. Liu , V-R Loggins , S. Lökös , K. Lovasz , D. Lynch , T. Majoros , Y.I. Makdisi , M. Makek , V.I. Manko , E. Mannel , M. Mccumber , P.L. Mcgaughey , D. Mcglinchey , C. Mckinney , M. Mendoza , A.C. Mignerey , D.E. Mihalik , A. Milov , D.K. Mishra , J.T. Mitchell , G. Mitsuka , S. Miyasaka , S. Mizuno , P. Montuenga , T. Moon , D.P. Morrison , S.I. Morrow , T. Murakami , J. Murata , K. Nagai , K. Nagashima , T. Nagashima , J.L. Nagle , M.I. Nagy , I. Nakagawa , K. Nakano , C. Nattrass , T. Niida , R. Nouicer , T. Novák , N. Novitzky , A.S. Nyanin , E. O'Brien , C.A. Ogilvie , J.D. Orjuela Koop , J.D. Osborn , A. Oskarsson , G.J. Ottino , K. Ozawa , V. Pantuev , V. Papavassiliou , J.S. Park , S. Park , S.F. Pate , M. Patel , W. Peng , D.V. Perepelitsa , G.D.N. Perera , D.Yu. Peressounko , C.E. Perezlara , J. Perry , R. Petti , M. Phipps , C. Pinkenburg , R.P. Pisani , M.L. Purschke , P.V. Radzevich , K.F. Read , D. Reynolds , V. Riabov , Y. Riabov , D. Richford , T. Rinn , S.D. Rolnick , M. Rosati , Z. Rowan , J. Runchey , A.S. Safonov , T. Sakaguchi , H. Sako , V. Samsonov , M. Sarsour , S. Sato , B. Schaefer , B.K. Schmoll , K. Sedgwick , R. Seidl , A. Sen , R. Seto , A. Sexton , D. Sharma , I. Shein , T.-A. Shibata , K. Shigaki , M. Shimomura , T. Shioya , P. Shukla , A. Sickles , C.L. Silva , D. Silvermyr , B.K. Singh , C.P. Singh , V. Singh , M.J. Skoby , M. Slunečka , M. Snowball , R.A. Soltz , W.E. Sondheim , S.P. Sorensen , I.V. Sourikova , P.W. Stankus , S.P. Stoll , T. Sugitate , A. Sukhanov , T. Sumita , J. Sun , Z. Sun , J. Sziklai , K. Tanida , M.J. Tannenbaum , S. Tarafdar , A. Taranenko , G. Tarnai , R. Tieulent (2) , A. Timilsina , T. Todoroki , M. Tomášek , C.L. Towell , R.S. Towell , I. Tserruya , Y. Ueda , B. Ujvari , H.W. van Hecke , J. Velkovska , M. Virius , V. Vrba , N. Vukman , X.R. Wang , Y.S. Watanabe , C.P. Wong , C.L. Woody , C. Xu , Q. Xu , L. Xue , S. Yalcin , Y.L. Yamaguchi , H. Yamamoto , A. Yanovich , J.H. Yoo , I. Yoon , H. Yu , I.E. Yushmanov , W.A. Zajc , A. Zelenski , S. Zharko , L. Zou

1 IPNO - Institut de Physique Nucléaire d'Orsay
2 IPNL - Institut de Physique Nucléaire de Lyon

We report the transverse single-spin asymmetries of J/ψ production at forward and backward rapidity, 1.2<|y|<2.2, as a function of J/ψ transverse momentum (pT) and Feynman-x (xF). The data analyzed were recorded by the PHENIX experiment at the Relativistic Heavy Ion Collider in 2015 from p+p, p+Al, and p+Au collisions with transversely polarized proton beams at sNN=200  GeV. At this collision energy, single-spin asymmetries for heavy-flavor particle production of p+p collisions provide access to the spin-dependent gluon distribution and higher-twist correlation functions inside the nucleon, such as the gluon Qiu-Sterman and trigluon correlation functions. Proton+nucleus collisions offer an excellent opportunity to study nuclear effects on the correlation functions. The data indicate a positive asymmetry at the two-standard-deviation level in the p+p data for 2  GeV/c

Mots clés: p p: colliding beams; heavy ion: colliding beams; spin: asymmetry; J/psi(3100): production; p: polarization; polarization: transverse; gluon: distribution function; spin: correlation; correlation function: (twist); rapidity dependence; distribution function: transverse momentum dependence; fragmentation function: (transverse momentum dependence); higher-twist; quantum chromodynamics: (factorization); heavy quark: production; Brookhaven RHIC Coll; PHENIX; 200 GeV

Domaines: Physique des Hautes Energies - Expérience [hep-ex]; Physique Nucléaire Expérimentale [nucl-ex]

C. Aidala, Y. Akiba, M. Alfred, V. Andrieux, N. Apadula, et al.. Single-spin asymmetry of $J/\psi$ production in $p+p$, $p+$Al, and $p+$Au collisions with transversely polarized proton beams at $\sqrt{s_{_{NN}}}=200$ GeV. Physical Review D, 2018, 98 (1), pp.012006. ⟨10.1103/PhysRevD.98.012006⟩. ⟨hal-01802030⟩