Production of ω mesons in p + p, d + Au, Cu + Cu, and Au + Au collisions at sNN=200 GeV

A. Adare et al. (PHENIX Collaboration)
Phys. Rev. C 84, 044902 – Published 7 October 2011

Abstract

The PHENIX experiment at the Relativistic Heavy Ion Collider has measured ω meson production via leptonic and hadronic decay channels in p+p, d+Au, Cu+Cu, and Au+Au collisions at sNN = 200 GeV. The invariant transverse momentum spectra measured in different decay modes give consistent results. Measurements in the hadronic decay channel in Cu+Cu and Au+Au collisions show that ω production has a suppression pattern at high transverse momentum, similar to that of π0 and η in central collisions, but no suppression is observed in peripheral collisions. The nuclear modification factors, RAA, are consistent in Cu+Cu and Au+Au collisions at similar numbers of participant nucleons.

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  • Received 17 May 2011

DOI:https://doi.org/10.1103/PhysRevC.84.044902

©2011 American Physical Society

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Vol. 84, Iss. 4 — October 2011

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