Study of Production of (Anti-)deuteron Observed in Au+Au Collisions at √SNN = 14.5,62.4,and 200GeV sNN p = 14:5, 62.4, and 200GeV

Transverse momentum distributions of deuterons and antideuterons in Au + Au collisions at √sNN p = 14:5, 62.4, and 200 GeV with
different centrality are studied in the framework of the multisource thermal model. Transverse momentum spectra are conformably
and approximately described by the Tsallis distribution. The dependence of parameters (average transverse momenta, effective
temperature, and entropy index) on event centrality is obtained. It is found that the parameters T increase and q decrease with
increase of the average number of particles involved in collisions, which reveals the transverse excitation degree increases with
collision centrality.