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# Rencontre de Physique des Particules 2015

15-16 janvier 2015
Institut Henri Poincaré
Fuseau horaire Europe/Paris

## Fluctuation signatures of the QCD critical point

15 janv. 2015 à 13:15
20m
Amphi Hermite (Institut Henri Poincaré)

### Amphi Hermite

#### Institut Henri Poincaré

11, rue Pierre et Marie Curie 75005 Paris

### Orateur

Dr Lance Labun (University of Texas, Austin)

### Description

Locating the QCD critical point is the goal of several major heavy ion collision experiments, and it may be possible to see signatures of critical behaviour in event-by-event fluctuations of conserved charges. We show characteristic peaks in the third $\chi_3$ and fourth $\chi_4$ fluctuation moments of baryon number as a function of chemical potential (or center of mass energy) and how they depend on proximity of freeze out to the critical point. In a model independent analysis, we explain qualitative features of the moments' dependence on chemical potential and temperature near the critical point, and we identify a few signatures, such as relative location of the $\chi_3$ and $\chi_4$ peaks, expected to be robust. Using the Gross Neveu model we provide a quantitative example of these predictions, which may support experimental observations of a peak in $\chi_4$ as a signature of the critical point.

### Auteurs principaux

Dr Jian Deng (Shandong University) Dr Jiunn-Wei Chen (National Taiwan University) Dr Lance Labun (University of Texas, Austin)

### Documents de présentation

Aucun document.
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