Glauber like model and multiplicity analysis of identified particles in proton proton collisions at LHC energies

Abstract

Quark Gluon Plasma (QGP) is a primordial matter found few microseconds after the Big bang. This thesis presents elementary discussions on Quark Gluon Plasma and its possible signatures in proton-proton collisions. The theory behind QGP formation and its presence in high energy collisions experiments along with open problem explaining need for number of binary collisions of partons in protonproton collisions to formulate initial conditions using Glauber model is presented. We then discuss methodology for reproducing charged particle distribution using Glauber formulation coupled with negative binomial distribution (NBD). The role of Multi Parton Interaction (MPI) in proton proton collisions along with analysis methodology for understanding identified/ strange/ multi-strange particle production mechanism is studied using PYTHIA8 event generator. We discuss the Ç pT È, dN d y , particle ratios and newly proposed quantity Rpp are determined as a function of charged particle multiplicity at mid and forward rapidities.