Fluctuation Probes of Early-Time Correlations in Nuclear Collisions

Details Fluctuation Probes of Early-Time Correlations in Nuclear Collisions Fluctuation Probes of Early-Time Correlations in Nuclear Collisions

2011-07-17

arxiv.org/abs/1107.3317v2

Physics

Nuclear Physics

Nuclear Theory

1 Figure and references added. Results unchanged

Scientific paper

Correlation measurements imply that anisotropic flow in nuclear collisions includes a novel triangular component along with the more familiar elliptic-flow contribution. Triangular flow has been attributed to event-wise fluctuations in the initial shape of the collision volume. We ask two questions: 1) How do these shape fluctuations impact other event-by-event observables? 2) Can we disentangle fundamental information on the early time fluctuations from the complex flow that results? We study correlation and fluctuation observables in a framework in which flux tubes in an early Glasma stage later produce hydrodynamic flow. Calculated multiplicity and transverse momentum fluctuations are in excellent agreement with data from 62.4 GeV Au+Au up to 2.76 TeV Pb+Pb.

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