Analysis of transverse momentum spectra of protons,deuterons,and tritons in symmetric heavy-ion collisions at√S_(NN)=200 GeV at the RHIC  

作　　者：Waqas Ahmad Ihsan Ullah Ali Zaman Imran Khan Akhtar Iqbal Abdul Qudus Sana Ullah Naseeb Ullah Muhammad Ramzan 

机构地区：[1]Department of Physics,University of Science and Technology,Bannu,KP,28100 Pakistan [2]Department of Physics,COMSATS University Islamabad,Islamabad,Pakistan [3]Department of Physics,The University of Lakki Marwat,Lakki Marwat,Khyber Pukhtunkhwa,Pakistan [4]Department of Physics,Govt.Degree College,Sarai Naorang,Khyber Pukhtunkhwa,Pakistan

出　　处：《Chinese Physics C》2025年第1期223-237,共15页中国物理C(英文版)

摘　　要：The blast wave model with Tsallis statistics is used to analyze the transverse momentum spectra of protons(p),deuterons(d),and tritons(t)in√S_(NN)=200 GeV gold-gold(Au-Au)collisions at the RHIC in various centrality bins.In particular transverse momentum ranges,the model results closely match experimental data from the PHENIX(p)and STAR(d and t)collaborations.The data are compared with those of protons obtained in Cu+Cu collisions and deuterons and tritons in Ru+Ru collisions at a center of mass energy of 200 GeV from the STAR collaboration.Particle spectra are used to derive the kinetic freeze-out temperatures,transverse flow velocities,and freeze-out volumes.According to the findings,the kinetic freeze-out temperature increases from the central to peripheral collisions.In this transition,the transverse flow velocity and freeze-out volume both decrease.For the collisions of both collaborations,this study reveals mass-dependent kinetic freeze-out temperature and differential volume possibilities.Overall,the non-extensivity parameter q decreases with increasing centrality of the studied heavy-ion collisions,and heavier mass particles have smaller values of q,which implies higher degrees of thermalization and equilibrium in more central collisions and for heavier particles.

关 键 词：transverse momentum temperature Au+Au Cu+Cu FREEZE-OUT STAR collisions LHC Pb+Pb 

分 类 号：O571.6[理学—粒子物理与原子核物理]