Systematic analysis of the pp collisions at LHC energies with Tsallis function

TL;DR

This paper analyzes transverse momentum distributions of various hadrons and nuclei produced in pp collisions at different energies using the Tsallis model, revealing how parameters like temperature and non-extensivity vary with particle mass and collision energy.

Contribution

It provides a systematic application of the Tsallis model to pp collision data across multiple energies, extracting medium characteristics and their dependence on particle mass and collision energy.

Findings

Effective temperature increases with particle mass and collision energy.

Non-extensivity parameter decreases with particle mass.

Multiplicity parameter N0 increases with collision energy.

Abstract

This work focuses on the study of identified hadrons and strange hadrons, recorded by CMS, and light nuclei and their anti-nuclei, recorded by ALICE, at 0.9 TeV, 2.76 TeV, 7 TeV and 13 TeV centre of mass energies in pp collision at mid rapidities. The transverse momentum distributions of these particles are analyzed using the Tsallis model, which fits the experimental data very well. Several important parameters for studying the characteristics of the medium produced during such collisions are extracted. The effective temperature (T) increases monotonically with increasing particle mass and also with increasing collision energy. The non-extensivity parameter (q) decreases with the mass of the particle. For heavier particles, greater T and smaller q mean that they decouple early from the system and attain equilibrium quickly compared to lighter ones. Furthermore, with an increase in collision energy, the multiplicity parameter N0 increases.