Abstract:
In nucleus-nucleus collisions, new particles are produced mainly through strong interactions
among the constituents of the QCD medium. The search of a unified phenomenological model to understand
this production mechanism is one of the main motivation behind the heavy ion experiments. A vast
variety of data coming from nucleus-nucleus collision experiments put a stringent constraint on the particle
production models. A unified and proper model must satisfy the various data regarding pseudorapidity
distributions, transverse energy density distributions, transverse momentum distributions with respect to
control parameters in different types of collisions at various energies simultaneously. Recently we proposed
a new version of wounded quark model (WQM) which actually satisfies many points of this criteria.
However, these kind of static initial model conditions have problem in calculating the transverse momentum
distributions of charged hadrons. In this article, we have used the important ingredients of WQM like
number of wounded quarks and number of quark-quark collisions to fit the transverse momentum spectra
of charged hadrons. Based on the assumption of different mechanisms at different regions, i.e. different
mechanisms for soft pT and hard momentum part, we have proposed a parameterization made of two
functions to calculate the transverse momentum spectra in different collisions at different energies ranging
from higher RHIC to LHC. We hope that this study along with our recent work on WQM will become
a more suitable choice as unified model for particle production in strong interaction, instead of wounded
nucleon model.
