Production of pi(0) and eta mesons in Cu plus Au collisions at root S-NN=200 GeV

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http://hdl.handle.net/10138/272985

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PHENIX Collaboration , Aidala , C , Kim , D J , Krizek , F , Novitzky , N & Rak , J 2018 , ' Production of pi(0) and eta mesons in Cu plus Au collisions at root S-NN=200 GeV ' , Physical Review C , vol. 98 , no. 5 , 054903 . https://doi.org/10.1103/PhysRevC.98.054903

Title: Production of pi(0) and eta mesons in Cu plus Au collisions at root S-NN=200 GeV
Author: Aidala, C.; Ajitanand, N. N.; Akiba, Y.; Akimoto, R.; Alexander, J.; Alfred, M.; Aoki, K.; Apadula, N.; Asano, H.; Atomssa, E. T.; Awes, T. C.; Azmoun, B.; Babintsev,; Bagoly, A.; Bai, M.; Bai, X.; Bannier, B.; Barish, K. N.; Bathe, S.; Baublis,; Baumann, C.; Baumgart, S.; Bazilevsky, A.; Beaumier, M.; Belmont, R.; Berdnikov, A.; Berdnikov, Y.; Black, D.; Blau, D. S.; Boer, M.; Bok, J. S.; Boyle, K.; Brooks, M. L.; Bryslawskyj, J.; Buesching, H.; Bumazhnov, V.; Butsyk, S.; Campbell, S.; Roman, V. Canoa; Chen, C-H; Chi, C. Y.; Chiu, M.; Choi, I. J.; Choi, J. B.; Choi, S.; Christiansen, P.; Kim, D. J.; Krizek, F.; Novitzky, N.; Rak, J.
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
Date: 2018-11-19
Number of pages: 11
Belongs to series: Physical Review C
ISSN: 2469-9985
URI: http://hdl.handle.net/10138/272985
Abstract: Production of pi(0) and eta mesons has been measured at midrapidity in Cu+Au collisions at root S-NN = 200 GeV. Measurements were performed in pi(0) (eta) -> gamma gamma decay channel in the 1(2)-20 GeV/c transverse momentum range. A strong suppression is observed for pi(0) and eta meson production at high transverse momentum in central Cu+Au collisions relative to the p + p results scaled by the number of nucleon-nucleon collisions. In central collisions the suppression is similar to Au + Au with comparable nuclear overlap. The eta/pi(0) ratio measured as a function of transverse momentum is consistent with m(T)-scaling parametrization down to p(T) = 2 GeV/c, its asymptotic value is constant and consistent with Au + Au and p + p and does not show any significant dependence on collision centrality. Similar results were obtained in hadron-hadron, hadron-nucleus, and nucleus-nucleus collisions as well as in e(+)e(-) collisions in a range of collision energies root S-NN = 3-1800 GeV. This suggests that the quark-gluon-plasma medium produced in Cu+Cu collisions either does not affect the jet fragmentation into light mesons or it affects the pi(0) and eta the same way.
Subject: QUARK-GLUON PLASMA
LARGE TRANSVERSE-MOMENTUM
ENERGY-LOSS
JET
COLLABORATION
PERSPECTIVE
DEPENDENCE
DETECTOR
TEV
QCD
114 Physical sciences
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