Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-07-27
Nucl.Phys.A830:701c-704c,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 3 figures - To appear in the conference proceedings for Quark Matter 2009, March 30 - April 4, Knoxville, Tennessee
Scientific paper
10.1016/j.nuclphysa.2009.09.059
We report an extension of charged kaon transverse momentum ($p_T$) spectra at mid-rapidity ($\mid y\mid <$ 0.5) up to 15 GeV/$c$, neutral kaon $p_T$ spectra up to 12 GeV/$c$ using events triggered by the Barrel Electro-Magnetic Calorimeter (BEMC) from p+p collisions at $\sqrt{s_{NN}}$ = 200 GeV. The $K^{\pm}/\pi^{\pm}$ and $K^{0}/\pi^{\pm}$ at high $p_T$ are compared in p+p and Au+Au collisions, and nuclear modification factor ($R_{AA}$)for pion, kaon, proton and rho are discussed. The $R_{AA}$ for kaon in central collisions are consistent with theory calculation having jet conversion in a plasma of quarks and gluons.
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