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Measurements of double-helicity asymmetries in inclusive J/Psi production in longitudinally polarized p plus p collisions at root s=510 GeV

Authors
Adare, A.Aidala, C.Ajitanand, N. N.Akiba, Y.Akimoto, R.Alfred, M.Apadula, N.Aramaki, Y.Asano, H.Atomssa, E. T.Awes, T. C.Azmoun, B.Babintsev, V.Bai, M.Bandara, N. S.Bannier, B.Barish, K. N.Bathe, S.Bazilevsky, A.Beaumier, M.Beckman, S.Belmont, R.Berdnikov, A.Berdnikov, Y.Black, D.Blau, D. S.Bok, J. S.Boyle, K.Brooks, M. L.Bryslawskyj, J.Buesching, H.Bumazhnov, V.Campbell, S.Chen, C. -H.Chi, C. Y.Chiu, M.Choi, I. J.Choi, J. B.Chujo, T.Citron, Z.Csanad, M.Csorgo, T.Danley, T. W.Datta, A.Daugherity, M. S.David, G.DeBlasio, K.Dehmelt, K.Denisov, A.Deshpande, A.Desmond, E. J.Ding, L.Dion, A.Diss, P. B.Do, J. H.Drees, A.Drees, K. A.Durham, J. M.Durum, A.Enokizono, A.En'yo, H.Esumi, S.Fadem, B.Feege, N.Fields, D. E.Finger, M.Finger, M., Jr.Fokin, S. L.Frantz, J. E.Franz, A.Frawley, A. D.Gal, C.Gallus, P.Garg, P.Ge, H.Giordano, F.Glenn, A.Goto, Y.Grau, N.Greene, S. V.Perdekamp, M. GrosseGu, Y.Gunji, T.Guragain, H.Hachiya, T.Haggerty, J. S.Hahn, K. I.Hamagaki, H.Hamilton, H. F.Han, S. Y.Hanks, J.Hasegawa, S.Haseler, T. O. S.Hashimoto, K.He, X.Hemmick, T. K.Hill, J. C.Hollis, R. S.Homma, K.Hong, B.Hoshino, T.Hotvedt, N.Huang, J.Huang, S.Ikeda, Y.Imai, K.Imazu, Y.Inaba, M.Iordanova, A.Isenhower, D.Ivanishchev, D.Jacak, B. V.Jeon, S. J.Jezghani, M.Jia, J.Jiang, X.Johnson, B. M.Joo, E.Joo, K. S.Jouan, D.Jumper, D. S.Kanda, S.Kang, J. H.Kang, J. S.Kawall, D.Kazantsev, A. V.Key, J. A.Khachatryan, V.Khanzadeev, A.Kihara, K.Kim, C.Kim, D. H.Kim, D. J.Kim, E. -J.Kim, G. W.Kim, H. -J.Kim, M.Kim, Y. K.Kimelman, B.Kistenev, E.Kitamura, R.Klatsky, J.Kleinjan, D.Kline, P.Koblesky, T.Kofarago, M.Komkov, B.Koster, J.Kotov, D.Kurita, K.Kurosawa, M.Kwon, Y.Lacey, R.Lajoie, J. G.Lebedev, A.Lee, K. B.Lee, S.Lee, S. H.Leitch, M. J.Leitgab, M.Li, X.Lim, S. H.Liu, M. X.Lynch, D.Makdisi, Y. I.Makek, M.Manion, A.Manko, V. I.Mannel, E.McCumber, M.McGaughey, P. L.McGlinchey, D.McKinney, C.Meles, A.Mendoza, M.Meredith, B.Miake, Y.Mignerey, A. C.Miller, A. J.Milov, A.Mishra, D. K.Mitchell, J. T.Miyasaka, S.Mizuno, S.Mohanty, A. K.Montuenga, P.Moon, T.Morrison, D. P.Moukhanova, T. V.Murakami, T.Murata, J.Mwai, A.Nagamiya, S.Nagashima, K.Nagle, J. L.Nagy, M. I.Nakagawa, I.Nakagomi, H.Nakano, K.Nattrass, C.Netrakanti, P. K.Nihashi, M.Niida, T.Nishimura, S.Nouicer, R.Novak, T.Novitzky, N.Nyanin, A. S.O'Brien, E.Ogilvie, C. A.Koop, J. D. OrjuelaOsborn, J. D.Oskarsson, A.Ozawa, K.Pak, R.Pantuev, V.Papavassiliou, V.Park, J. S.Park, S.Pate, S. F.Patel, L.Patel, M.Peng, J. -C.Perepelitsa, D. V.Perera, G. D. N.Peressounko, D. Yu.Perry, J.Petti, R.Pinkenburg, C.Pinson, R.Pisani, R. P.Purschke, M. L.Rak, J.Ramson, B. J.Ravinovich, I.Read, K. F.Reynolds, D.Riabov, V.Riabov, Y.Rinn, T.Riveli, N.Roach, D.Rolnick, S. D.Rosati, M.Rowan, Z.Rubin, J. G.Sahlmueller, B.Saito, N.Sakaguchi, T.Sako, H.Samsonov, V.Sarsour, M.Sato, S.Sawada, S.Schaefer, B.Schmoll, B. K.Sedgwick, K.Seele, J.Seidl, R.Sen, A.Seto, R.Sett, P.Sexton, A.Sharma, D.Shein, I.Shibata, T. -A.Shigaki, K.Shimomura, M.Shukla, P.Sickles, A.Silva, C. L.Silvermyr, D.Singh, B. K.Singh, C. P.Singh, V.Slunecka, M.Snowball, M.Soltz, R. A.Sondheim, W. E.Sorensen, S. P.Sourikova, I. V.Stankus, P. W.Stepanov, M.Stoll, S. P.Sugitate, T.Sukhanov, A.Sumita, T.Sun, J.Sziklai, J.Takahara, A.Taketani, A.Tanida, K.Tannenbaum, M. J.Tarafdar, S.Taranenko, A.Tieulent, R.Timilsina, A.Todoroki, T.Tomasek, M.Torii, H.Towell, C. L.Towell, M.Towell, R.Towell, R. S.Tserruya, I.van Hecke, H. W.Vargyas, M.Velkovska, J.Virius, M.Vrba, V.Vznuzdaev, E.Wang, X. R.Watanabe, D.Watanabe, Y.Watanabe, Y. S.Wei, F.Whitaker, S.White, A. S.Wolin, S.Woody, C. L.Wysocki, M.Xia, B.Xue, L.Yalcin, S.Yamaguchi, Y. L.Yanovich, A.Yoo, J. H.Yoon, I.Younus, I.Yu, H.Yushmanov, I. E.Zajc, W. A.Zelenski, A.Zhou, S.Zou, L.
Issue Date
29-12월-2016
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v.94, no.11
Indexed
SCIE
SCOPUS
Journal Title
PHYSICAL REVIEW D
Volume
94
Number
11
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/86493
DOI
10.1103/PhysRevD.94.112008
ISSN
2470-0010
Abstract
We report the double-helicity asymmetry, A(LL)(J/Psi), in inclusive J/Psi production at forward rapidity as a function of transverse momentum p(T) and rapidity |y|. The data analyzed were taken during root s = 510 GeV longitudinally polarized p + p collisions at the Relativistic Heavy Ion Collider in the 2013 run using the PHENIX detector. At this collision energy, J/Psi particles are predominantly produced through gluon-gluon scatterings, thus A(LL)(J/Psi) is sensitive to the gluon polarization inside the proton. We measured A(LL)(J/Psi) by detecting the decay daughter muon pairs mu(+)mu(-) within the PHENIX muon spectrometers in the rapidity range 1.2 < |y| < 2.2. In this kinematic range, we measured the A(LL)(J/Psi) to be 0.012 +/- 0.010 (stat) +/- 0.003 (syst). The A(LL)(J.Psi) can be expressed to be proportional to the product of the gluon polarization distributions at two distinct ranges of Bjorken x: one at moderate range x approximate to 5 x 10(-2) where recent data of jet and pi(0) double helicity spin asymmetries have shown evidence for significant gluon polarization, and the other one covering the poorly known small-x region x approximate to 2 x 10(-3). Thus our new results could be used to further constrain the gluon polarization for x < 5 x 10(-2).
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