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By Star Collaboration


The main motivation for studying heavy ion collision at high energy is the study quantum chromodynamics in extreme conditions of high temperature and high ene density[1]. One of the proposed signatures of a possible phase transition of nuclear ma to deconfined state of quarks and gluons is the modification of vector meson product rates and their in-medium properties[3]. K ∗ meson is of particular interest due to very short life time and its strange quark content, which makes K ∗ meson sensitive to properties of the dense matter and provide information regarding strangeness product from early partonic phase[2][8]. The study of K ∗ meson provides a better understand on the role of rescattering and regeneration effects in hadron production. The interp of these two competing processes is guaged through particle ratio studies of K ∗ /K − φ/K ∗ in p + p and nucleus-nucleaus collisions. The mass of K ∗ is close to the ma

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