Fluctuations in relativistic heavy-ion collisions from the Glauber models

Details Fluctuations in relativistic heavy-ion collisions from the Glauber models Fluctuations in relativistic heavy-ion collisions from the Glauber models

2009-10-19

arxiv.org/abs/0910.3585v1

Acta Phys.Polon.Supp.3:513-522,2010

Physics

Nuclear Physics

Nuclear Theory

10 pages, presented by WB at Three Days of Strong Interactions, Wroclaw, 9-11 July 2009, EMMI Workshop and XXVI Max Born Sympo

Scientific paper

In the first part of the talk we discuss the role of the two-body nucleon-nucleon correlations on signatures of the heavy-ion collisions which are a priori expected to be sensitive to these effects. We find that while the fluctuations of the number of produced particles are indeed affected, other quantities (v_2 fluctuations, size fluctuations) are insensitive to the presence of the NN correlations in the nucleon distributions. In the second part we show that the fluctuations of the transverse size of the initial source cause, after a suitable hydrodynamic evolution, fluctuations of the transverse flow velocity at hadronic freeze-out. This in turn yields the event-by-event fluctuations of the transverse momentum of the produced particles, p_T. Our results demonstrate that practically all of the observed event-by-event p_T fluctuations may be explained this way.

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