Production of omega mesons at Large Transverse Momenta in p+p and d+Au Collisions at sqrt(s_NN) = 200 GeV

Abstract

The PHENIX experiment at RHIC has measured the invariant cross section for omega-meson production at mid-rapidity in the transverse momentum range 2.5 < p_T < 9.25 GeV/c in p+p and d+Au collisions at sqrt(s_NN) = 200 GeV. Measurements in two decay channels (omega --> pi^0 pi^+ pi^- and omega --> pi^0 gamma) yield consistent results, and the reconstructed omega mass agrees with the accepted value within the p_T range of the measurements. The omega/pi^0 ratio is found to be 0.85 +/- 0.05(stat) +/- 0.09(sys) and 0.94 +/- 0.08(stat) +/- 0.12(sys) in p+p and d+Au collisions respectively, independent of p_T . The nuclear modification factor R_dA is 1.03 +/- 0.12(stat) +/- 0.21(sys) and 0.83 +/- 0.21(stat) +/- 0.17(sys) in minimum bias and central (0-20%) d+Au collisions, respectively.

arXiv comment330 authors, 6 pages text, 4 figures, 1 table. Submitted to Phys. Rev. Lett. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html

References in corpus (16)

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• Initial State Parton Broadening and Energy Loss Probed in d+Au at RHIC
• High transverse momentum eta meson production in p+p, d+Au and Au+Au collisions at sqrt(s_NN) = 200 GeV
• Observations on dA scattering at forward rapidities
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• Diffraction Dissociation - 50 Years Later
• Minimal 3-3-1 model, lepton mixing and muonium-antimuonium conversion
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Cited by in corpus (16)

• Detailed measurement of the e+e- pair continuum in p+p and Au+Au collisions at sqrt(s_NN)=200 GeV and implications for direct photon production
• Measurement of neutral mesons in p+p collisions at sqrt(s) = 200 GeV and scaling properties of hadron production
• Thermal Photons and Collective Flow at the Relativistic Heavy-Ion Collider
• Dilepton mass spectra in p+p collisions at sqrt(s)= 200 GeV and the contribution from open charm
• Statistical Origin of Constituent-Quark Scaling in the QGP hadronization
• Inclusive pi^0, eta, and direct photon production at high transverse momentum in p+p and d+Au collisions at sqrt(s_NN) = 200 GeV
• Production of omega mesons in p+p, d+Au, Cu+Cu, and Au+Au collisions at sqrt(s_NN)=200 GeV
• Di-electron spectrum at mid-rapidity in $p+p$ collisions at $\sqrt{s}=200$ GeV
• Di-lepton production in p+p collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV from STAR
• Meson spectra and m_T scaling in p+p, d+Au and Au+Au collisions at \sqrtS_NN=200 GeV
• e+e- Pairs: a clock and a thermometer of heavy ion collisions
• Production of $\omega$ mesons in pp collisions at $\sqrt{s}$ = 7 TeV
• Light Vector Mesons
• The di-lepton physics program at STAR
• Measurement of light mesons at RHIC by the PHENIX experiment
• Dependence of Single Particle Distributions on Rapidity and Centrality in d+Au Collisions at \snn = 200 GeV