0 70 20 22 v 1 9 F eb 2 00 7 Measurement of leptonic and hadronic decays of ω - and φ - mesons at RHIC by PHENIX

Measurement of leptonic and hadronic decays of ω-and φ-mesons at RHIC by PHENIX Abstract. The PHENIX experiment at RHIC measured production of the ω-and φ-mesons in p + p, d + Au and Au + Au collisions at √ s N N = 63 and 200 GeV. Particle properties were studied using hadronic and di-electron decay channels. Transverse momentum (mass) spectra measured in different decay modes are found to be in agreement with each other within the errors. Nuclear modification factors R AA measured for both mesons are consistent with results previously obtained for other neutral mesons. Position of the meson mass peaks and their widths reconstructed in hadronic decay channels are in agreement with their properties measured in vacuum.