Transverse single-spin asymmetry of midrapidity $\pi^{0}$ and $\eta$ mesons in $p$+Au and $p$+Al collisions at $\sqrt{s_{_{NN}}}=$ 200 GeV

• Main Authors: Acharya, U, Andrieux, V, Azmoun, B, Babintsev, V, Bazilevsky, A, Beaumier, M, Bok, J. S, Bryslawskyj, J, Roman, V. Canoa, Cervantes, R, Connors, M, David, G, DeBlasio, K, Denisov, A, Dion, A, Do, J. H, Durham, J. M, Durum, A, Fadem, B, Fan, W, Fields, D. E, Finger,Jr, M, Firak, D, Fokin, S. L, Franz, A, Frawley, A. D, Goto, Y, Perdekamp, M. Grosse, Gunji, T, Hamagaki, H, Hamilton, H. F, Hanks, J, Harvey, M, He, X, Hollis, R. S, Hotvedt, N, Huang, J, Inaba, M, Iordanova, A, Ivanishchev, D, Jacak, B. V, Jiang, X, Ji, Z, Jumper, D. S, Kazantsev, A. V, Kim, C, Kim, E. -J, Kingan, A, Kotov, D, Kudo, S, Lajoie, J. G, Leung, Y. H, Lökös, S, Majoros, T, Makek, M, Mannel, E, McCumber, M, Mignerey, A. C, Mishra, D. K, Mitrankov, Iu, Mizuno, S, Mondal, M. M, Moon, T, Morrison, D. P, Muhammad, A, Murakami, T, Nagashima, T, Nakano, K, Nattrass, C, Nouicer, R, Nyanin, A. S, O'Brien, E, Ottino, G. J, Ozawa, K, Pantuev, V, Peressounko, D. Yu, Pun, A, Richford, D, Runchey, J, Samsonov, V, Schmoll, B. K, Sedgwick, K, Seto, R, Shibata, M, Shimomura, M, Sickles, A, Singh, C. P, Soltz, R. A, Stoll, S. P, Sun, J, Takahama, R, Tanida, K, Tannenbaum, M. J, Taranenko, A, Tarnai, G, van Hecke, H. W, Yoo, J. H, Yushmanov, I. E, Yu, H, Zelenski, A
• Format: Journal Article
• Language: English
• Published: 13.03.2023
• Subjects: Physics - High Energy Physics - Experiment
• DOI: 10.48550/arxiv.2303.07190

Presented are the first measurements of the transverse single-spin asymmetries ($A_N$) for neutral pions and eta mesons in $p$+Au and $p$+Al collisions at $\sqrt{s_{_{NN}}}=200$ GeV in the pseudorapidity range $|\eta|<$0.35 with the PHENIX detector at the Relativistic Heavy Ion Collider. The asymmetries are consistent with zero, similar to those for midrapidity neutral pions and eta mesons produced in $p$+$p$ collisions. These measurements show no evidence of additional effects that could potentially arise from the more complex partonic environment present in proton-nucleus collisions.