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Title: Correlated stopping, proton clusters and higher order proton cumulants

Abstract

Here, we investigate possible effects of correlations between stopped nucleons on higher order proton cumulants at low energy heavy-ion collisions. We find that fluctuations of the number of wounded nucleons Npart lead to rather nontrivial dependence of the correlations on the centrality; however, this effect is too small to explain the large and positive four-proton correlations found in the preliminary data collected by the STAR collaboration at √s = 7.7 GeV. We further demonstrate that, by taking into account additional proton clustering, we are able to qualitatively reproduce the preliminary experimental data. We speculate that this clustering may originate either from collective/multi-collision stopping which is expected to be effective at lower energies or from a possible first-order phase transition, or from (attractive) final state interactions. To test these ideas we propose to measure a mixed multi-particle correlation between stopped protons and a produced particle (e.g. pion, antiproton).

Authors:
 [1];  [2];  [3]
  1. AGH Univ. of Science and Technology, Krakow (Poland)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States). Riken BNL Research Center; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1371533
Alternate Identifier(s):
OSTI ID: 1379832
Report Number(s):
BNL-114044-2017-JA
Journal ID: ISSN 1434-6044; R&D Project: PO-3
Grant/Contract Number:  
SC0012704; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 77; Journal Issue: 5; Journal ID: ISSN 1434-6044
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Riken BNL Research Center

Citation Formats

Bzdak, Adam, Koch, Volker, and Skokov, Vladimir. Correlated stopping, proton clusters and higher order proton cumulants. United States: N. p., 2017. Web. doi:10.1140/epjc/s10052-017-4847-0.
Bzdak, Adam, Koch, Volker, & Skokov, Vladimir. Correlated stopping, proton clusters and higher order proton cumulants. United States. doi:10.1140/epjc/s10052-017-4847-0.
Bzdak, Adam, Koch, Volker, and Skokov, Vladimir. Fri . "Correlated stopping, proton clusters and higher order proton cumulants". United States. doi:10.1140/epjc/s10052-017-4847-0. https://www.osti.gov/servlets/purl/1371533.
@article{osti_1371533,
title = {Correlated stopping, proton clusters and higher order proton cumulants},
author = {Bzdak, Adam and Koch, Volker and Skokov, Vladimir},
abstractNote = {Here, we investigate possible effects of correlations between stopped nucleons on higher order proton cumulants at low energy heavy-ion collisions. We find that fluctuations of the number of wounded nucleons Npart lead to rather nontrivial dependence of the correlations on the centrality; however, this effect is too small to explain the large and positive four-proton correlations found in the preliminary data collected by the STAR collaboration at √s = 7.7 GeV. We further demonstrate that, by taking into account additional proton clustering, we are able to qualitatively reproduce the preliminary experimental data. We speculate that this clustering may originate either from collective/multi-collision stopping which is expected to be effective at lower energies or from a possible first-order phase transition, or from (attractive) final state interactions. To test these ideas we propose to measure a mixed multi-particle correlation between stopped protons and a produced particle (e.g. pion, antiproton).},
doi = {10.1140/epjc/s10052-017-4847-0},
journal = {European Physical Journal. C, Particles and Fields},
number = 5,
volume = 77,
place = {United States},
year = {2017},
month = {5}
}

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Cited by: 6 works
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