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Title: Cumulants and correlation functions versus the QCD phase diagram

Here, we discuss the relation of particle number cumulants and correlation functions. It is argued that measuring couplings of the genuine multiparticle correlation functions could provide cleaner information on possible nontrivial dynamics in heavy-ion collisions. We also extract integrated multiproton correlation functions from the presently available experimental data on proton cumulants. We find that the STAR data contain significant four-proton correlations, at least at the lower energies, with indication of changing dynamics in central collisions. We also find that these correlations are rather long ranged in rapidity. Finally, using the Ising model, we demonstrate how the signs of the multiproton correlation functions may be used to exclude certain regions of the phase diagram close to the critical point.
Authors:
 [1] ;  [2] ;  [2]
  1. AGH - Univ. of Science and Technology, Krakow (Poland)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Nuclear Science Division
Publication Date:
Grant/Contract Number:
AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 95; Journal Issue: 5; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1379847
Alternate Identifier(s):
OSTI ID: 1356870

Bzdak, Adam, Koch, Volker, and Strodthoff, Nils. Cumulants and correlation functions versus the QCD phase diagram. United States: N. p., Web. doi:10.1103/PhysRevC.95.054906.
Bzdak, Adam, Koch, Volker, & Strodthoff, Nils. Cumulants and correlation functions versus the QCD phase diagram. United States. doi:10.1103/PhysRevC.95.054906.
Bzdak, Adam, Koch, Volker, and Strodthoff, Nils. 2017. "Cumulants and correlation functions versus the QCD phase diagram". United States. doi:10.1103/PhysRevC.95.054906. https://www.osti.gov/servlets/purl/1379847.
@article{osti_1379847,
title = {Cumulants and correlation functions versus the QCD phase diagram},
author = {Bzdak, Adam and Koch, Volker and Strodthoff, Nils},
abstractNote = {Here, we discuss the relation of particle number cumulants and correlation functions. It is argued that measuring couplings of the genuine multiparticle correlation functions could provide cleaner information on possible nontrivial dynamics in heavy-ion collisions. We also extract integrated multiproton correlation functions from the presently available experimental data on proton cumulants. We find that the STAR data contain significant four-proton correlations, at least at the lower energies, with indication of changing dynamics in central collisions. We also find that these correlations are rather long ranged in rapidity. Finally, using the Ising model, we demonstrate how the signs of the multiproton correlation functions may be used to exclude certain regions of the phase diagram close to the critical point.},
doi = {10.1103/PhysRevC.95.054906},
journal = {Physical Review C},
number = 5,
volume = 95,
place = {United States},
year = {2017},
month = {5}
}