K[s]-meson production in Cu+Cu collisions at center-of-mass energy of 200 GeV per nucleon pair

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Abstract:

Measurements for K[s]-meson invariant yields and nuclear modification factors at high transverse momentum in Cu+Cu collisions at center-of-mass energy of 200 GeV per nucleon pair are presented. A twofold-suppression of the K[s]-meson yield in central Cu+Cu collisions is found to authenticate of the hot and dense matter creation in the central ultrarelativistic Cu+Cu collisions.