Measurement of the relative yields of ψ(2S) to ψ(1S) mesons produced at forward and backward rapidity in p+p, p+Al, p+Au, and He 3 +Au collisions at s NN =200 GeV

T. Csorgo, K. DeBlasio, K. Dehmelt, A. Denisov, A. Deshpande, E. J. Desmond, A. Dion, P. B. Diss, D. Dixit, J. H. Do, A. Drees, K. A. Drees, Mirta Dumancic, J. M. Durham, A. Durum, J. P. Dusing, T. Elder, A. Enokizono, H. En'yo, S. EsumiB. Fadem, W. Fan, N. Feege, D. E. Fields, M. Finger, M., Jr. Finger, S. L. Fokin, J. E. Frantz, A. Franz, A. D. Frawley, Y. Fukuda, C. Gal, P. Gallus, P. Garg, H. Ge, F. Giordano, A. Glenn, 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, K. Hashimoto, X. He, T. K. Hemmick, J. C. Hill, K. Hill, R. S. Hollis, K. Homma, B. Hong, T. Hoshino, N. Hotvedt, J. Huang, Song - Jeng Huang, K. Imai, J. Imrek, M. Inaba, A. Iordanova, D. Isenhower, Y. Ito, D. Ivanishchev, B. V. Jacak, M. Jezghani, Z. Ji, J. Jia, X. Jiang, B. M. Johnson, V. Jorjadze, D. Jouan, D. S. Jumper, S. Kanda, J. H. Kang, D. Kapukchyan, S. Karthas, D. Kawall, A. V. Kazantsev, J. A. Key, V. Khachatryan, A. Khanzadeev, C. Kim, D. J. Kim, E. -J. Kim, G. W. Kim, M. Kim, M. L. Kimball, B. Kimelman, D. Kincses, E. Kistenev, R. Kitamura, J. Klatsky, D. Kleinjan, P. Kline, T. Koblesky, B. Komkov, J. R. Kotler, D. Kotov, S. Kudo, K. Kurita, M. Kurosawa, Y. Kwon, R. Lacey, J. G. Lajoie, E. O. Lallow, A. Lebedev, Seung Joon Lee, S. H. Lee, M. J. Leitch, Y. H. Leung, N. A. Lewis, X. Li, S. H. Lim, L. D. Liu, M. X. Liu, V-R Loggins, V. -R. Loggins, K. Lovasz, D. Lynch, T. Majoros, Y. I. Makdisi, Mihael Makek, M. Malaev, A. Manion, V. I. Manko, E. Mannel, H. Masuda, M. McCumber, P. L. McGaughey, D. McGlinchey, C. McKinney, A. Meles, A. R. Mendez, M. Mendoza, A. C. Mignerey, D. E. Mihalik, Alexander Milov, D. K. Mishra, J. T. Mitchell, G. Mitsuka, S. Miyasaka, S. Mizuno, A. K. Mohanty, P. Montuenga, T. Moon, D. P. Morrison, S. I. M. Morrow, T. V. Moukhanova, T. Murakami, J. Murata, A. Mwai, K. Nagai, K. Nagashima, T. Nagashima, J. L. Nagle, M. I. Nagy, I. Nakagawa, H. Nakagomi, K. Nakano, C. Nattrass, P. K. Netrakanti, T. Niida, S. Nishimura, R. Nouicer, T. Novak, N. Novitzky, R. Novotny, A. S. Nyanin, E. O'Brien, C. A. Ogilvie, J. D. Orjuela Koop, J. D. Osborn, A. Oskarsson, G. J. Ottino, K. Ozawa, R. Pak, V. Pantuev, V. Papavassiliou, J. S. Park, S. Park, S. F. Pate, M. Patel, J. -C. Peng, W. Peng, D. V. Perepelitsa, G. D. N. Perera, D. Yu. Peressounko, C. E. PerezLara, J. Perry, R. Petti, M. Phipps, C. Pinkenburg, R. Pinson, R. P. Pisani, C. J. Press, A. Pun, M. L. Purschke, J. Rak, B. J. Ramson, Ilia Ravinovich, K. F. Read, D. Reynolds, V. Riabov, Y. Riabov, D. Richford, T. Rinn, S. D. Rolnick, M. Rosati, Z. Rowan, J. G. Rubin, J. Runchey, A. S. Safonov, B. Sahlmueller, N. Saito, T. Sakaguchi, H. Sako, V. Samsonov, M. Sarsour, K. Sato, S. Sato, B. Schaefer, B. K. Schmoll, K. Sedgwick, R. Seidl, A. Sen, R. Seto, P. Sett, A. Sexton, Deepali Sharma, I. Shein, T. -A. Shibata, K. Shigaki, M. Shimomura, T. Shioya, P. Shukla, A. Sickles, C. L. Silva, J. A. Silva, D. Silvermyr, B. K. Singh, C. P. Singh, V. Singh, M. Slunecka, K. L. Smith, M. Snowball, R. A. Soltz, W. E. Sondheim, S. P. Sorensen, I. V. Sourikova, P. W. Stankus, M. Stepanov, H. Stien, S. P. Stoll, T. Sugitate, A. Sukhanov, T. Sumita, J. Sun, S. Syed, J. Sziklai, A. Takeda, A. Taketani, K. Tanida, M. J. Tannenbaum, Sourav Tarafdar, Arkadiy Taranenko, G. Tarnai, R. Tieulent, A. Timilsina, T. Todoroki, M. Tomasek, C. L. Towell, R. Towell, R. S. Towell, Itzhak Tserruya, Y. Ueda, B. Ujvari, Hecke, H. W. van Hecke, S. Vazquez-Carson, J. Velkovska, M. Virius, V. Vrba, N. Vukman, X. R. Wang, Z. Wang, Y. Watanabe, Y. S. Watanabe, F. Wei, A. S. White, C. P. Wong, C. L. Woody, M. Wysocki, B. Xia, C. Xu, Q. Xu, L. Xue, S. Yalcin, Y. L. Yamaguchi, H. Yamamoto, A. Yanovich, P. Yin, J. H. Yoo, I. Yoon, H. Yu, I. E. Yushmanov, W. A. Zajc, A. Zelenski, S. Zharko, S. Zhou, L. Zou,

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Abstract

The PHENIX Collaboration has measured the ratio of the yields of ψ(2S) to ψ(1S) mesons produced in p+p, p+Al, p+Au, and He3+Au collisions at sNN=200 GeV over the forward and backward rapidity intervals 1.2<|y|<2.2. We find that the ratio in p+p collisions is consistent with measurements at other collision energies. In collisions with nuclei, we find that in the forward (p-going or He3-going) direction, the relative yield of ψ(2S) mesons to ψ(1S) mesons is consistent with the value measured in p+p collisions. However, in the backward (nucleus-going) direction, the ψ(2S) meson is preferentially suppressed by a factor of ∼2. This suppression is attributed in some models to the breakup of the weakly bound ψ(2S) meson through final-state interactions with comoving particles, which have a higher density in the nucleus-going direction. These breakup effects may compete with color screening in a deconfined quark-gluon plasma to produce sequential suppression of excited quarkonia states.

Original languageEnglish
Article number034904
JournalPhysical Review C
Volume95
Issue number3
DOIs
StatePublished - 9 Mar 2017

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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