Multiplicity-Momentum Correlations in Relativistic Nuclear Collisions

Authors

  • Mary Cody Lawrence Technological University
  • Sean Gavin Wayne State University
  • Brendan Koch Lawrence Technological University
  • Mark Kocherovsky Lawrence Technological University
  • Zoulfekar Mazloum Wayne State University
  • George Moschelli Lawrence Technological University

DOI:

https://doi.org/10.31349/SuplRevMexFis.3.040906

Keywords:

Nuclear collision

Abstract

We introduce a two-particle correlation observable that measures multiplicity-momentum correlations and may facilitate an estimate of the level of equilibration of the medium created in relativistic nuclear collisions. We calculate that multiplicity-momentum correlations should vanish in equilibrium in the Grand Canonical Ensemble, therefore non-zero measured values may indicate that the system has not reached local thermal equilibrium. Information about the level of equilibration of the system is important because many state-of-the-art models assume local equilibration either directly or through the use of an equation of state that makes this assumption. We make estimates of multiplicity-momentum correlations using PYTHIA/Angantyr and find positive values comparable in magnitude to well-measured correlations of transverse momentum fluctuations. We then outline a formalism that can use multiplicity-momentum correlations and correlations of transverse momentum fluctuations to quantify the level of partial thermalization of the system.

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Published

2022-12-10

How to Cite

1.
Cody M, Gavin S, Koch B, Kocherovsky M, Mazloum Z, Moschelli G. Multiplicity-Momentum Correlations in Relativistic Nuclear Collisions. Supl. Rev. Mex. Fis. [Internet]. 2022 Dec. 10 [cited 2023 Feb. 6];3(4):040906 1-7. Available from: https://rmf.smf.mx/ojs/index.php/rmf-s/article/view/6827