Production of K*-mesons in the copper-gold nuclei collisionsat √(s_NN) = 200 GeV

Nuclear physics

This paper presents invariant transverse momentum spectra and nuclear modification factors of K*(892)-mesons measured in the Cu + Au collisions at √(s_NN ) = 200 GeV. The measurements were performed in five centrality bins in the range of transverse momentum from 2.00 to 5.75 GeV/c in the PHENIX experiment at the RHIC. Nuclear modification factors were compared with previously obtained PHENIX data in Cu + Cu collisions at √(s_NN ) = 200 GeV. The nuclear modification factors of K*-mesons in Cu + Cu and Cu + Au collisions at the same values of a number of participants Npartwere found to have similar values (within uncertainties).