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Production of ω mesons at large transverse momenta in p+p and d+Au collisions at sNN=200 GeV

S. S. Adler et al. (PHENIX Collaboration)
Phys. Rev. C 75, 051902(R) – Published 9 May 2007

Abstract

The PHENIX experiment at RHIC has measured the invariant cross section for ω-meson production at midrapidity in the transverse momentum range 2.5<pT<9.25 GeV/c in p+p and d+Au collisions at sNN=200 GeV. Measurements in two decay channels (ωπ0π+π and ωπ0γ) yield consistent results, and the reconstructed ω mass agrees with the accepted value within the pT range of the measurements. The ω/π0 ratio is found to be 0.85±0.05stat±0.09sys in p+p and 0.94±0.08stat±0.12sys in d+Au collisions, independent of pT. The nuclear modification factor RdAω is 1.03±0.12stat±0.21sys and 0.83±0.21stat±0.17sys in minimum bias and central (0–20%) d+Au collisions, respectively.

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  • Received 18 November 2006

DOI:https://doi.org/10.1103/PhysRevC.75.051902

©2007 American Physical Society

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Vol. 75, Iss. 5 — May 2007

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