Naslov
Production of π0 and η mesons in Cu+Au collisions at sNN=200GeV

Autori
Aidala, C. ; ... ; Makek, Mihael ; ... ; Zou, L.

Kolaboracija
PHENIX Collaboration

Izvornik
Physical review. C (2469-9985) 98 (2018), 5; 054903, 11

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
mesons ; Cu+Au ; PHENIX

Sažetak
Production of π0 and η mesons has been measured at midrapidity in Cu+Au collisions at sNN=200GeV. Measurements were performed in π0(η)→γγ decay channel in the 1(2)-20GeV/c transverse momentum range. A strong suppression is observed for π0 and η 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 η/π0 ratio measured as a function of transverse momentum is consistent with mT-scaling parametrization down to pT=2GeV/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 sNN=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 π0 and η the same way.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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