Regular Article - Theoretical Physics
Transverse-momentum spectra and nuclear modification factor using Boltzmann Transport Equation with flow in Pb+Pb collisions at TeV
Discipline of Physics, School of Basic Sciences, Indian Institute of Technology Indore, 453552, Indore, India
* e-mail: Raghunath.Sahoo@cern.ch
Accepted: 17 April 2017
Published online: 18 May 2017
In the continuation of our previous work, the transverse-momentum () spectra and nuclear modification factor () are derived using the relaxation time approximation of Boltzmann Transport Equation (BTE). The initial -distribution used to describe p + p collisions has been studied with the perturbative-Quantum Chromodynamics (pQCD) inspired power-law distribution, Hagedorn's empirical formula and with the Tsallis non-extensive statistical distribution. The non-extensive Tsallis distribution is observed to describe the complete range of the transverse-momentum spectra. The Boltzmann-Gibbs Blast Wave (BGBW) distribution is used as the equilibrium distribution in the present formalism, to describe the -distribution and nuclear modification factor in nucleus-nucleus collisions. The experimental data for Pb+Pb collisions at TeV at the Large Hadron Collider at CERN have been analyzed for pions, kaons, protons, and . It is observed that the present formalism while explaining the transverse-momentum spectra up to 5 GeV/c, explains the nuclear modification factor very well up to 8 GeV/c in for all these particles except for protons. is found to be independent of the degree of non-extensivity, after GeV/c.
© SIF, Springer-Verlag Berlin Heidelberg, 2017