Levy analysis of Bose-Einstein correlation in pp collisions at s 7 TeV measured with the ATLAS

TL;DR

This paper investigates Bose-Einstein correlations in 7 TeV proton-proton collisions using Levy distribution parametrization to explore the space structure of particle emission, considering source expansion effects.

Contribution

It introduces Levy distribution as a generalized model for particle-emission sources, incorporating the stability index to analyze correlations in high-energy collisions.

Findings

Parameters depend on charged particle density.

Parameters depend on mean transverse momentum.

Levy distribution provides a better fit for expanding sources.

Abstract

Bose-Einstein correlations in proton-proton collisions is an effective tool to study the space structure of the production amplitude. Usually rather simple parametrization of particle-emission distribution function has been used - exponential or gaussian form. However if one consider a particle source as an expanding media the symmetric Levy distribution as the generalization exponential can be used.Then additional parameter - the index of stability - will appear. All parameters dependencies on the charged particle density and on the mean transverse momentum of the pion/hadron in the correlated pair are investigated.