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: PHENIX Collaboration; Aidala, C.; 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
Language: eng
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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