On the precise determination of the Tsallis parameters in proton - proton collisions at LHC energies

TL;DR

This paper investigates the Tsallis distribution parameters in proton-proton collisions at LHC energies, revealing particle-specific differences and the absence of universal scaling across species, thus refining the understanding of particle spectra.

Contribution

It provides a detailed analysis of Tsallis parameters for different particles at multiple LHC energies, highlighting their dependence on particle type and challenging the notion of universal scaling.

Findings

Tsallis formula fits pT distributions well at LHC energies

Parameters T and q vary with particle species

No mT scaling or universality of parameters across particles

Abstract

A detailed analysis is presented of the precise values of the Tsallis parameters obtained in $p-p$ collisions for identified particles, pions, kaons and protons at the LHC at three beam energies $\sqrt{s} = 0.9, 2.76$ and $7$ TeV. Interpolated data at $\sqrt{s} = $ 5.02 TeV have also been included. It is shown that the Tsallis formula provides reasonably good fits to the $p_T$ distributions in $p-p$ collisions at the LHC using three parameters $dN/dy$, $T$ and $q$. However, the parameters $T$ and $q$ depend on the particle species and are different for pions, kaons and protons. As a consequence there is no $m_T$ scaling and also no universality of the parameters for different particle species.