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.
Primary author
Mrs
Denise Godoy
(ss)
