Nuclear Modification Factor Using Tsallis Non-extensive Statistics
  The nuclear modification factor is derived using Tsallis non-extensive statistics in relaxation time approximation. The variation of nuclear modification factor with transverse momentum for different values of non-extensive parameter, $q$, is also observed. The experimental data from RHIC and LHC are analysed in the framework of Tsallis non-extensive statistics in a relaxation time approximation. It is shown that the proposed approach explains the $R_{AA}$ of all particles over a wide range of transverse momenta but doesn't seem to describe the rise in $R_{AA}$ at very high transverse momenta. 
Sushanta Tripathy, Trambak Bhattacharyya, Prakhar Garg, Prateek Kumar,   Raghunath Sahoo, and Jean Cleymans
nucl-th hep-ph nucl-ex