Critical opalescence: An optical signature for a QCD critical point

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Four possible scenarios are considered for a transition from a quark-gluon matter to hadronic matter, and their corresponding correlation signatures are discussed. Four criteria are highlighted for a definitive experimental search for a QCD critical point. An old-new experimental measure, the optical opacity (or its inverse the nuclear attenuation length) is determined, in terms of a combination of nuclear suppression factors and a measurement of the relevant fireball length scales. Length scale estimates using either the Hanbury Brown - Twiss radii or that of the initial nuclear geometry for measurements of optical opacity with respect to the reaction plane yield, somewhat surprizingly, nearly the same nuclear attenuation lenght in 0-5 % most central 200 GeV Au+Au collisions, corresponding to 2.9 ± 0.3 fm. The necessity and the possibility of measuring critical exponents is also discussed in the context of determination of the universality class of the QCD critical point. Critical opalescence is proposed to locate such a critical point on the QCD phase diagram, corresponding to a maximum of optical opacity in heavy ion experiments.

Original languageEnglish
Title of host publicationProceedings of Science
Publication statusPublished - 2009
Event5th International Workshop on Critical Point and Onset of Deconfinement, CPOD 2009 - Long Island, NY, United States
Duration: Jun 8 2009Jun 12 2009

Other

Other5th International Workshop on Critical Point and Onset of Deconfinement, CPOD 2009
CountryUnited States
CityLong Island, NY
Period6/8/096/12/09

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opalescence
critical point
quantum chromodynamics
opacity
signatures
attenuation
fireballs
heavy ions
phase diagrams
retarding
exponents
quarks
collisions
radii
estimates
geometry

ASJC Scopus subject areas

  • General

Cite this

Critical opalescence : An optical signature for a QCD critical point. / Csörgő, T.

Proceedings of Science. 2009.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Csörgő, T 2009, Critical opalescence: An optical signature for a QCD critical point. in Proceedings of Science. 5th International Workshop on Critical Point and Onset of Deconfinement, CPOD 2009, Long Island, NY, United States, 6/8/09.
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