# The effect of single-particle space-momentum angle distribution on two-pion HBT correlation in high-energy heavy-ion collisions

## TL;DR

This paper investigates how the distribution of space-momentum angles of single particles influences the transverse momentum dependence of HBT radii in high-energy heavy-ion collisions, using various source models.

## Contribution

It demonstrates the significant role of single-particle space-momentum angle distribution in shaping HBT radii dependence on transverse momentum, providing formulas and numerical connections.

## Key findings

- Single-particle space-momentum angle distribution affects HBT radii
- Formulas describe transverse momentum dependence of HBT radii
- Numerical connection established between distributions and radii

## Abstract

Using several source models, we analyze the transverse momentum dependence of HBT radii in the relativistic heavy-ion collisions. The results indicate that the single-particle space-momentum angle distribution plays an important role in the transverse momentum dependence of HBT radii. In a cylinder source, we use several formulas to describe the transverse momentum dependence of HBT radii and the single-particle space-momentum angle distribution. We also make a numerical connection between them in the transverse plane.