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

, T. Csorgo, E. J. Desmond, L. Ding, A. Dion, P. B. Diss, J. H. Do, A. Drees, K. A. Drees, J. M. Durham, A. Durum, A. Enokizono, H. En'yo, S. Esumi, B. Fadem, N. Feege, D. E. Fields, M. Finger, M., Jr. Finger, S. L. FokinJ. E. Frantz, A. Franz, A. D. Frawley, C. Gal, P. Gallus, P. Garg, H. Ge, F. Giordano, A. Glenn, Y. Goto, N. Grau, S. V. Greene, M. Grosse Perdekamp, Y. Gu, 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, K. Hashimoto, X. He, T. K. Hemmick, J. C. Hill, R. S. Hollis, K. Homma, B. Hong, T. Hoshino, N. Hotvedt, J. Huang, Song - Jeng Huang, Y. Ikeda, K. Imai, Y. Imazu, M. Inaba, A. Iordanova, D. Isenhower, D. Ivanishchev, B. V. Jacak, S. J. Jeon, M. Jezghani, J. Jia, X. Jiang, B. M. Johnson, E. Joo, K. S. Joo, D. Jouan, D. S. Jumper, S. Kanda, J. H. Kang, J. S. Kang, D. Kawall, A. V. Kazantsev, J. A. Key, V. Khachatryan, A. Khanzadeev, K. Kihara, C. Kim, D. H. Kim, D. J. Kim, E. -J. Kim, G. W. Kim, H. -J. Kim, M. Kim, Y. K. Kim, B. Kimelman, E. Kistenev, R. Kitamura, J. Klatsky, D. Kleinjan, P. Kline, T. Koblesky, M. Kofarago, B. Komkov, J. Koster, D. Kotov, K. Kurita, M. Kurosawa, Y. Kwon, R. Lacey, J. G. Lajoie, A. Lebedev, K. B. Lee, Seung Joon Lee, S. H. Lee, M. J. Leitch, M. Leitgab, X. Li, S. H. Lim, M. X. Liu, D. Lynch, Y. I. Makdisi, Mihael Makek, A. Manion, V. I. Manko, E. Mannel, M. McCumber, P. L. McGaughey, D. McGlinchey, C. McKinney, A. Meles, M. Mendoza, B. Meredith, Y. Miake, A. C. Mignerey, A. J. Miller, Alexander Milov, D. K. Mishra, J. T. Mitchell, S. Miyasaka, S. Mizuno, A. K. Mohanty, P. Montuenga, T. Moon, D. P. Morrison, T. V. Moukhanova, T. Murakami, J. Murata, A. Mwai, S. Nagamiya, K. Nagashima, J. L. Nagle, M. I. Nagy, I. Nakagawa, H. Nakagomi, K. Nakano, C. Nattrass, P. K. Netrakanti, M. Nihashi, T. Niida, S. Nishimura, R. Nouicer, T. Novak, N. Novitzky, A. S. Nyanin, E. O'Brien, C. A. Ogilvie, J. D. Orjuela Koop, J. D. Osborn, A. Oskarsson, K. Ozawa, R. Pak, V. Pantuev, V. Papavassiliou, J. S. Park, S. Park, S. F. Pate, L. Patel, M. Patel, J. -C. Peng, D. V. Perepelitsa, G. D. N. Perera, D. Yu. Peressounko, J. Perry, R. Petti, C. Pinkenburg, R. Pinson, R. P. Pisani, M. L. Purschke, J. Rak, B. J. Ramson, Ilia Ravinovich, K. F. Read, D. Reynolds, V. Riabov, Y. Riabov, T. Rinn, N. Riveli, D. Roach, S. D. Rolnick, M. Rosati, Z. Rowan, J. G. Rubin, B. Sahlmueller, N. Saito, T. Sakaguchi, H. Sako, V. Samsonov, M. Sarsour, S. Sato, S. Sawada, B. Schaefer, B. K. Schmoll, K. Sedgwick, J. Seele, R. Seidl, A. Sen, R. Seto, P. Sett, A. Sexton, Deepali Sharma, I. Shein, T. -A. Shibata, K. Shigaki, M. Shimomura, P. Shukla, A. Sickles, C. L. Silva, D. Silvermyr, B. K. Singh, C. P. Singh, V. Singh, M. Slunecka, M. Snowball, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, P. W. Stankus, M. Stepanov, S. P. Stoll, T. Sugitate, A. Sukhanov, T. Sumita, J. Sun, J. Sziklai, A. Takahara, A. Taketani, K. Tanida, M. J. Tannenbaum, Sourav Tarafdar, Arkadiy Taranenko, R. Tieulent, A. Timilsina, T. Todoroki, M. Tomasek, H. Torii, C. L. Towell, M. Towell, R. Towell, R. S. Towell, Itzhak Tserruya, Hecke, H. W. van Hecke, M. Vargyas, J. Velkovska, M. Virius, V. Vrba, E. Vznuzdaev, X. R. Wang, D. Watanabe, Y. Watanabe, Y. S. Watanabe, F. Wei, S. Whitaker, A. S. White, S. Wolin, C. L. Woody, M. Wysocki, B. Xia, L. Xue, S. Yalcin, Y. L. Yamaguchi, A. Yanovich, J. H. Yoo, I. Yoon, I. Younus, H. Yu, I. E. Yushmanov, W. A. Zajc, A. Zelenski, S. Zhou, L. Zou

Research output: Contribution to journalArticlepeer-review

Abstract

We report the double-helicity asymmetry, ALLJ/ψ, in inclusive J/ψ production at forward rapidity as a function of transverse momentum pT and rapidity |y|. The data analyzed were taken during 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/ψ particles are predominantly produced through gluon-gluon scatterings, thus ALLJ/ψ is sensitive to the gluon polarization inside the proton. We measured ALLJ/ψ by detecting the decay daughter muon pairs μ+μ- within the PHENIX muon spectrometers in the rapidity range 1.2<|y|<2.2. In this kinematic range, we measured the ALLJ/ψ to be 0.012±0.010 (stat) ±0.003 (syst). The ALLJ/ψ 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≈5×10-2 where recent data of jet and π0 double helicity spin asymmetries have shown evidence for significant gluon polarization, and the other one covering the poorly known small-x region x≈2×10-3. Thus our new results could be used to further constrain the gluon polarization for x<5×10-2.

Original languageAmerican English
Article number112008
JournalPhysical review D
Volume94
Issue number11
DOIs
StatePublished - 29 Dec 2016

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Fingerprint

Dive into the research topics of 'Measurements of double-helicity asymmetries in inclusive J /ψ production in longitudinally polarized p+p collisions at s =510 GeV'. Together they form a unique fingerprint.

Cite this