Glauber model for a small system using the anisotropic and inhomogeneous density profile of a proton

Abstract

Recent studies reveal that at high energies, collisions of a small system such as p+p gives signatures similar to that widely observed in heavy ion collisions hinting toward the possibility of forming a medium with collective behavior. With this motivation, we have used the Glauber model, which is traditionally applied to heavy ion collisions, in a small system using the anisotropic and inhomogeneous density profile of a proton and found that the proposed model reproduces the charged particle multiplicity distribution of p+p collisions at LHC energies very well. Collision geometric properties such as the mean impact parameter, the mean number of binary collisions (Ncoll), and the mean number of participants (Npart) at different multiplicities are determined. Having estimated âNcollâ ©, we have calculated the nuclear modificationlike factor (RHL) in p+p collisions. We also estimated eccentricity and elliptic flow as a function of charged particle multiplicity using the linear response to the initial geometry. © 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/" Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.