# Quark Matter 2019 - the XXVIIIth International Conference on Ultra-relativistic Nucleus-Nucleus Collisions

3-9 November 2019
Wanda Reign Wuhan Hotel
Asia/Shanghai timezone

## Measurements of HBT correlations and Levy source parameters in Au+Au collisions at the STAR experiment

4 Nov 2019, 17:40
20m
Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

#### Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation Collective dynamics and final state interaction

### Speaker

Dániel Kincses (Eötvös Loránd University Budapest)

### Description

To study the nature of the quark-hadron phase transition, it is important to investigate the space-time structure of the hadron emission source in heavy-ion collisions. Measurements of HBT correlations have proven to be a powerful tool to gain information about the particle emission region. In this study, Levy fits were performed to the measured one-dimensional two-pion correlation functions in Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV. The three extracted parameters are: the Levy scale parameter, $R$, which is in connection with the physical size of the source, the correlation strength parameter, $\lambda$, and the Levy exponent, $\alpha$, which is related to one of the critical exponents (the correlation exponent $\eta$). It is important to investigate the dependence of these parameters on the average transverse mass, $m_T$, as well as on centrality and $\sqrt{s_{NN}}$. In this poster, we report the current status of the analysis of the extracted Levy source parameters.

### Primary author

Dániel Kincses (Eötvös Loránd University Budapest)

### Co-author

Dániel Kincses (Eötvös Loránd University)