Production of π0 and η mesons in Cu+Au collisions at √sNN = 200 GeV
PHENIX Collaboration. (2018). Production of π0 and η mesons in Cu+Au collisions at √sNN = 200 GeV. Physical Review C, 98(5), Article 054903. https://doi.org/10.1103/PhysRevC.98.054903
Julkaistu sarjassa
Physical Review CTekijät
Päivämäärä
2018Tekijänoikeudet
© The Authors, 2018.
Production of π0 and η mesons has been measured at midrapidity in Cu+Au collisions at √sNN = 200 GeV.
Measurements were performed in π0 (η) → γ γ decay channel in the 1(2)-20 GeV/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 = 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 nucleusnucleus 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.
...
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American Physical SocietyISSN Hae Julkaisufoorumista
2469-9985Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/28777061
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