Study of K*(892)0 and ?(1020) meson production in proton–proton and Pb–Pb collisions at ■=2.76 TeV

作者：Y Ali; M Ahmed; A Arif; Q Ali; U Tabassam; U Rubab; M Suleymanov

来源：Communications in Theoretical Physics, 2021, 73(02): 93-99.

In this paper, we describe a study of charged particle yield as a function of pTfor K*(892)0 and ?(1020) mesons in proton–proton(pp) and Pb–Pb collisions at ■=?2.76 Te V in the central rapidity region of |y|<0.5, in a pTrange of ??3 Ge V c-1, the predictions were very close to the experimental data. Both models gave higher predictions for the soft pTinterval and lower predictions for the hard interactions. The values of the RAAdistributions were lower than unity and both models were very close to the ALICE data. It is very interesting that the models were not able to describe the pTdistributions, but they gave good predictions for their ratios. This may possibly be due to parton collective behaviors. We observed some additional suppression of K*0 at low values of pT with respect to f-mesons, which may be related to the role of the masses of the particles in soft interactions. The rising trend for RAA in the region from pT=?10 Ge V c-1 to 20 Ge V c-1 observed by the ALICE experiment was absent for the f-mesons.