Production of pi(0) and eta mesons in Cu plus Au collisions at root S-NN=200 GeV
- Title
- Production of pi(0) and eta mesons in Cu plus Au collisions at root S-NN=200 GeV
- Author
- 김용균
- Keywords
- QUARK-GLUON PLASMA; LARGE TRANSVERSE-MOMENTUM; ENERGY-LOSS; JET; COLLABORATION; PERSPECTIVE; DEPENDENCE; DETECTOR; TEV; QCD
- Issue Date
- 2018-11
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW C, v. 98, no. 5, Article no. 054903
- 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.
- URI
- https://journals.aps.org/prc/abstract/10.1103/PhysRevC.98.054903https://repository.hanyang.ac.kr/handle/20.500.11754/120550
- ISSN
- 2469-9985; 2469-9993
- DOI
- 10.1103/PhysRevC.98.054903
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > NUCLEAR ENGINEERING(원자력공학과) > Articles
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