Production of $\pi^0$ and $\eta$ mesons in U$+$U collisions at $\sqrt{s_{_{NN}}}=192$ GeV

• Main Authors: Aoki, K, Babintsev, V, Bai, X, Berdnikov, Y, Blankenship, B, Blau, D. S, Borisov, V, Bryslawskyj, J, Buesching, H, Chen, C. -H, Christiansen, P, Crossette, N, Csanád, M, D'Orazio, L, Drees, A, Drees, K. A, Esha, R, Esumi, S, Finger, M, de Cassagnac, R. Granier, Haggerty, J. S, Hester, T, Hill, J. C, Hoshino, T, Huang, J, Huang, S, Ikeda, Y, Jeon, S. J, Jiang, X, Johnson, B. M, Joo, K. S, Kang, J. H, Kawall, D, Key, J. A, Kincses, D, Koblesky, T, Kofarago, M, Komkov, B, Kurita, K, Kurosawa, M, Lacey, R, Larionova, D, Leitch, M. J, Lewis, B, Lewis, N. A, Lim, S. H, Lökös, S, Lynch, D, Makdisi, Y. I, McCumber, M, Meredith, B, Miake, Y, Mignerey, A. C, Miyasaka, S, Moskowitz, M, Nagae, T, Nelson, S, Netrakanti, P. K, Ogilvie, C. A, Ozawa, K, Pate, S. F, Patel, L, Peng, W, Perry, J, Pinkenburg, C, Qu, H, Riabov, V, Riabov, Y, Richford, D, Roach, D, Rolnick, S. D, Sakaguchi, T, Sako, H, Seele, J, Shigaki, K, Shoji, K, Shukla, P, Soltz, R. A, Stenlund, E, Sun, J, Sun, X, Tanida, K, Tannenbaum, M. J, Todoroki, T, Ueda, Y, Vazquez-Zambrano, E, Vértesi, R, Watanabe, Y, Whitaker, S, Wolin, S, Wong, C. P, Wu, Y, Wysocki, M, Xu, Q, Yanovich, A, Yoon, I, You, Z, Yushmanov, I. E, Zhai, Y, Zou, L
• Format: Journal Article
• Language: English
• Published: 29-05-2020
• Subjects: Physics - High Energy Physics - Experiment; Physics - Nuclear Experiment
• DOI: 10.48550/arxiv.2005.14686

Phys. Rev. C 102, 064905 (2020) The PHENIX experiment at the Relativistic Heavy Ion Collider measured $\pi^0$
and $\eta$ mesons at midrapidity in U$+$U collisions at $\sqrt{s_{_{NN}}}=192$
GeV in a wide transverse momentum range. Measurements were performed in the
$\pi^0(\eta)\rightarrow\gamma\gamma$ decay modes. A strong suppression of
$\pi^0$ and $\eta$ meson production at high transverse momentum was observed in
central U$+$U collisions relative to binary scaled $p$$+$$p$ results. Yields of
$\pi^0$ and $\eta$ mesons measured in U$+$U collisions show similar suppression
pattern to the ones measured in Au$+$Au collisions at $\sqrt{s_{_{NN}}}=200$
GeV for similar numbers of participant nucleons. The $\eta$/$\pi^0$ ratios do
not show dependence on centrality or transverse momentum, and are consistent
with previously measured values in hadron-hadron, hadron-nucleus,
nucleus-nucleus, and $e^+e^-$ collisions.