# Momentum Distribution and Correlation due to mass difference caused by power-like distribution

## TL;DR

This study investigates how mass differences influence momentum distribution and particle correlations within a Tsallis statistical framework, revealing that the entropic parameter q significantly affects these properties differently for soft and hard modes.

## Contribution

It introduces an analysis of momentum distribution and correlation considering mass differences using both conventional and q-expectation values within Tsallis statistics, highlighting the q-dependence effects.

## Key findings

- Momentum distribution for hard modes increases with q.
- Correlation at q>1 is larger for soft modes but smaller for hard modes.
- q-dependence is weaker in q-expectation value than in conventional expectation.

## Abstract

The momentum distribution and particle correlation due to the mass difference were studied both in the case of the conventional expectation value and in the case of $q$-expectation value, when the momentum distribution is described by a Tsallis distribution with the entropic parameter $q \ge 1$. The magnitude of the momentum distribution for hard modes increases as $q$ increases, and the $q$-dependence of the momentum distribution is quite weak for soft modes. The correlation at $q>1$ is larger than that at $q=1$ for soft modes, while the correlation at $q>1$ is smaller than that at $q=1$ for hard modes. The $q$-dependence of these quantities in the case of $q$-expectation value is weaker than that in the case of the conventional expectation value, respectively.