Effects of initial state fluctuations on the mean transverse momentum

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Author(s):	Gardim, Fernando G. ; Giacalone, Giuliano ; Luzum, Matthew ; Ollitrault, Jean-Yves Total Authors: 4
Document type:	Journal article
Source:	Nuclear Physics A; v. 1005, p. 4-pg., 2021-01-01.
Abstract
We show that in ideal hydrodynamic simulations of heavy-ion collisions, initial state fluctuations result in an increase of the mean transverse momentum of outgoing hadrons, (p(t)). Specifically, (p(t)) is larger by a few percent if realistic fluctuations are implemented than with smooth initial conditions, the multiplicity and impact parameter being kept fixed. We show that result can be traced back to the fact that for a given total entropy, the initial energy contained in the fluid is larger if the density profile is bumpy. We discuss the implication of these results for the extraction of the equation of state of QCD from experimental data. (AU)

FAPESP's process:	18/24720-6 - Exploring the QCD phase diagram
Grantee:	Frédérique Marie Brigitte Sylvie Grassi
Support Opportunities:	Research Projects - Thematic Grants


FAPESP's process:	16/24029-6 - Investigating the strong nuclear interactions under extreme conditions
Grantee:	Matthew William Luzum
Support Opportunities:	Research Grants - Young Investigators Grants


FAPESP's process:	17/05685-2 - Hadronic physics in high energy nuclear collisions
Grantee:	Jun Takahashi
Support Opportunities:	Special Projects