# NA61/SHINE results on Bose-Einstein correlations

## TL;DR

This paper reports on Bose-Einstein correlation measurements of identical pions in Be+Be collisions at SPS energies, revealing Levy-distributed source characteristics and their mT dependence, contributing to understanding the quark-hadron transition.

## Contribution

It provides new measurements of Bose-Einstein correlations in Be+Be collisions and analyzes Levy source parameters, offering insights into the space-time structure of pion emission.

## Key findings

- Correlation functions fit well with Levy-distributed sources
- Observed mT dependence of Levy source parameters
- Results contribute to understanding the quark-hadron transition

## Abstract

One of the main goals of NA61/SHINE is the investigation of the phase diagram of strongly interacting matter. NA61/SHINE observes collisions of various nuclei at different energies, allowing to study the same phenomena and observables in vastly different conditions. One of the observables related to the quark-hadron transition is the Bose-Einstein momentum correlation function of identical pions, related to the space-time structure of pion emission. In this paper we report on such measurements in Be+Be collisions at an SPS beam momentum of 150A GeV/c. Our correlation functions can be statistically well described with Levy-distributed sources, hence we also study the mT dependence of the Levy source parameters, and discuss their possible interpretations.