QCD critical region and higher moments for three flavor models - INSPIRE

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QCD critical region and higher moments for three flavor models

B.J. Schaefer
(
- Giessen U. and
- Graz U.
)
,
M. Wagner
(
- Bielefeld U.
)

Nov, 2011

12 pages

Published in:

Phys.Rev.D 85 (2012) 034027

e-Print:

1111.6871 [hep-ph]

DOI:

10.1103/PhysRevD.85.034027

Report number:

BI-TP-2011-45

View in:

ADS Abstract Service

reference search144 citations

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Abstract: (arXiv)

One of the distinctive feature of the QCD phase diagram is the possible emergence of a critical endpoint. The critical region around the critical point and the path dependency of the critical exponents is investigated within effective chiral (2+1)-flavor models with and without Polyakov-loops. Results obtained in no-sea mean-field approximations where a divergent vacuum part in the fermion-loop contribution is neglected, are confronted to the renormalized ones. Furthermore, the modifications caused by the back-reaction of the matter fluctuations on the pure Yang-Mills system are discussed. Higher order, non-Gaussian moments of event-by-event distributions of various particle multiplicities are enhanced near the critical point and could serve as a probe to determine its location in the phase diagram. By means of a novel derivative technique higher order generalized quark-number susceptibilities are calculated and their sign structure in the phase diagram is analyzed.

Note:

12 pages, 11 figures. Final PRD version (references and one more equation added)

12.38.Gc
11.30.Rd
12.38.Aw
11.10.Wx
quantum chromodynamics: critical phenomena
fermion number: susceptibility
matter: fluctuation
mean field approximation
non-Gaussianity
back reaction

References(93)

Figures(21)

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