Transverse momentum spectra and nuclear modification factors of charged particles in Xe�Xe collisions at sNN=5.44TeV

Abstract

Transverse momentum (pT) spectra of charged particles at mid-pseudorapidity in Xe�Xe collisions at sNN=5.44TeV measured with the ALICE apparatus at the Large Hadron Collider are reported. The kinematic range 0.15<pT<50GeV/c and |?|<0.8 is covered. Results are presented in nine classes of collision centrality in the 0�80% range. For comparison, a pp reference at the collision energy of s=5.44 TeV is obtained by interpolating between existing pp measurements at s=5.02 and 7 TeV. The nuclear modification factors in central Xe�Xe collisions and Pb�Pb collisions at a similar center-of-mass energy of sNN=5.02 TeV, and in addition at 2.76 TeV, at analogous ranges of charged particle multiplicity density ?dNch/d?? show a remarkable similarity at pT>10 GeV/c. The centrality dependence of the ratio of the average transverse momentum ?pT? in Xe�Xe collisions over Pb�Pb collision at s=5.02 TeV is compared to hydrodynamical model calculations. � 2018 The Author