Leptonic decay of $\varphi$(1020) meson measured with the STAR experiment

Abstract

We present the measurement of the $\varphi$(1020)$\to e^{+}{e}^{-}$ transverse momentum spectrum and yield for $0.3<p_T<2.5$ GeV at mid-rapidity ($|y|<1$) from the STAR experiment in Au+Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV and compare it to the yield and spectrum from the hadronic decays. We also compare the $\varphi$(1020) mass and width obtained by fitting Breit-Wigner function to simulated values. Particle identification based on the newly installed STAR Time-Of-Flight (TOF) detector in conjunction with energy-loss (dE/dx) based particle identification measurements from the Time Projection Chamber (TPC) are used for a clean electron and positron identification.

6 pages, 7 figures, Proceedings for the Strangeness in Quark Matter 2011

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Cited by in corpus (3)

• Momentum dependence of pion-induced $\varphi$ meson production on nuclei near threshold
• Testing the $\varphi$-nuclear potential in pion-induced $\varphi$ meson production on nuclei near threshold
• The di-lepton physics program at STAR