# 54. International Winter Meeting on Nuclear Physics

25-29 January 2016
Bormio, Italy
Europe/Berlin timezone

## Measurements of heavy flavours with the ALICE experiment at the LHC

28 Jan 2016, 18:25
20m
Bormio, Italy

#### Bormio, Italy

Poster Relativistic Heavy Ion Physics

### Speaker

Mrs Denise Godoy (ss)

### Description

Fluctuations of various observables in heavy-ion collisions at ultra-relativistic energies have been extensively studied as they provide important signals regarding the formation of Quark Gluon Plasma. Because of the large number of produced particles in each event, a detailed study of event-by-event multiplicity fluctuations has been proposed as one of the signatures of the phase transition. In addition, the understanding of multiplicity fluctuations is essential for other event-by-event measurements. In the present work, we have measured the scaled variance ($\omega=\sigma^2 / \mu$) of the charged particle multiplicity distributions as a function of centrality in Pb-Pb collisions at LHC energies. Here, $\mu$ and $\sigma$ denote the mean and the width of the multiplicity distributions, respectively. We will show how these quantities evolve with centrality, and discuss the influence of volume fluctuations on these measurements. Our results provide vital input to theoretical model calculations.

 Slides