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Title: Indications for a Critical End Point in the Phase Diagram for Hot and Dense Nuclear Matter

Abstract

Here, excitation functions for the Gaussian emission source radii difference ( R out 2 - R side 2 ) obtained from two-pion interferometry measurements in Au + Au ( s N N = 7.7 200 GeV ) and Pb + Pb ( s N N = 2.76 TeV ) collisions are reported on for a broad range of collision centralities. The observed nonmonotonic excitation functions validate the finite-size scaling patterns expected for the deconfinement phase transition and the critical end point (CEP), in the temperature versus baryon chemical potential ( T , μ B ) plane of the nuclear matter phase diagram. A finite-size scaling (FSS) analysis of these data suggests a second order phase transition with the estimates T cep ~ 165 MeV and μ B cep ~ 95 MeV for the location of the critical end point. The critical exponents ( ν 0.66 and γ 1.2 ) extracted via the same FSS analysis place this CEP in the 3D Ising model universality class.

Authors:
 [1]
  1. Stony Brook Univ., NY (United States)
Publication Date:
Research Org.:
Stony Brook Univ., NY (United States); State Univ. of New York (SUNY), Syracuse, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1598592
Alternate Identifier(s):
OSTI ID: 1179322
Grant/Contract Number:  
FG02-87ER40331
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 114; Journal Issue: 14; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Critical point

Citation Formats

Lacey, Roy A. Indications for a Critical End Point in the Phase Diagram for Hot and Dense Nuclear Matter. United States: N. p., 2015. Web. https://doi.org/10.1103/PhysRevLett.114.142301.
Lacey, Roy A. Indications for a Critical End Point in the Phase Diagram for Hot and Dense Nuclear Matter. United States. https://doi.org/10.1103/PhysRevLett.114.142301
Lacey, Roy A. Mon . "Indications for a Critical End Point in the Phase Diagram for Hot and Dense Nuclear Matter". United States. https://doi.org/10.1103/PhysRevLett.114.142301. https://www.osti.gov/servlets/purl/1598592.
@article{osti_1598592,
title = {Indications for a Critical End Point in the Phase Diagram for Hot and Dense Nuclear Matter},
author = {Lacey, Roy A.},
abstractNote = {Here, excitation functions for the Gaussian emission source radii difference (Rout2-Rside2) obtained from two-pion interferometry measurements in Au+Au (sNN=7.7–200GeV) and Pb+Pb (sNN=2.76TeV) collisions are reported on for a broad range of collision centralities. The observed nonmonotonic excitation functions validate the finite-size scaling patterns expected for the deconfinement phase transition and the critical end point (CEP), in the temperature versus baryon chemical potential (T,μB) plane of the nuclear matter phase diagram. A finite-size scaling (FSS) analysis of these data suggests a second order phase transition with the estimates Tcep~165MeV and μBcep~95MeV for the location of the critical end point. The critical exponents (ν≈0.66 and γ≈1.2) extracted via the same FSS analysis place this CEP in the 3D Ising model universality class.},
doi = {10.1103/PhysRevLett.114.142301},
journal = {Physical Review Letters},
number = 14,
volume = 114,
place = {United States},
year = {2015},
month = {4}
}

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