# Quark Matter 2018

13-19 May 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

## Volume fluctuations in multi-particle flow correlation measurement

15 May 2018, 17:00
2h 40m
First floor and third floor (Palazzo del Casinò)

### First floor and third floor

#### Palazzo del Casinò

Poster Correlations and fluctuations

### Speaker

Jiangyong Jia (Stony brook Universty (US))

### Description

Volume fluctuations are background for the event-by-event multiplicity fluctuation analysis, and its effects have been extensively studied for net-proton fluctuations in search of the QGP critical point. In this poster, we show that the two major volume fluctuations effects, centrality bin width and centrality resolution effects, can be probed using flow fluctuation measurements. Using a Glauber model with particle production, we show that the recently observed sign-change of the $c_2\{4\}$ in ultra-central collisions by ATLAS is directly sensitive to the amount of centrality smearing. Therefore the pattern of $c_2\{4\}$ sign-change can be used to quantify the centrality resolution effect. Furthermore, we find that the volume fluctuation effects naturally evolves with rapidity, and therefore the sign-change pattern of $c_2\{4\}$ also expected to evolve with rapidity. We explore new approaches based on flow measurements to constrain the volume fluctuation.

Centralised submission by Collaboration Presenter name already specified Theory

### Primary author

Mingliang Zhou (Stony brook Universty (US))

### Co-author

Jiangyong Jia (Stony brook Universty (US))

### Presentation Materials

There are no materials yet.
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