Measurements of neutral and charged kaon production at high [formula omitted] up to 15 GeV/ c at STAR

Abstract

We report an extension of charged kaon transverse momentum ( p T ) spectra at mid-rapidity ( | y | < 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 s N N = 200 GeV . The K ± / π ± and K 0 / π ± at high p T are compared in p+p and Au+Au collisions, and nuclear modification factor ( R A A ) for pion, kaon, proton and rho are discussed. The R A A for kaon in central collisions are consistent with theory calculation having jet conversion in a plasma of quarks and gluons.