Towards a determination of the chiral critical surface of QCD
- The chiral critical surface is a surface of second order phase transitions bounding the region of first order chiral phase transitions for small quark masses in the fmu;d;ms;mg parameter space. The potential critical endpoint of the QCD (T;m)-phase diagram is widely expected to be part of this surface. Since for m = 0 with physical quark masses QCD is known to exhibit an analytic crossover, this expectation requires the region of chiral transitions to expand with m for a chiral critical endpoint to exist. Instead, on coarse Nt = 4 lattices, we find the area of chiral transitions to shrink with m, which excludes a chiral critical point for QCD at moderate chemical potentials mB < 500 MeV. First results on finer Nt = 6 lattices indicate a curvature of the critical surface consistent with zero and unchanged conclusions. We also comment on the interplay of phase diagrams between the Nf = 2 and Nf = 2+1 theories and its consequences for physical QCD.
Author: | Owe PhilipsenORCiDGND |
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URN: | urn:nbn:de:hebis:30:3-272864 |
ISSN: | 1824-8039 |
Parent Title (English): | Proceedings of Science |
Publisher: | Scuola Internazionale Superiore di Studi Avanzati, SISSA |
Place of publication: | Trieste |
Document Type: | Conference Proceeding |
Language: | English |
Date of Publication (online): | 2012/12/17 |
Year of first Publication: | 2009 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Release Date: | 2012/12/17 |
Volume: | 2009 |
Issue: | CPOD 2009: 026 |
Page Number: | 8 |
Note: | 5th International Workshop on Critical Point and Onset of Deconfinement - CPOD 2009, June 08 - 12 2009, Brookhaven National Laboratory, Long Island, New York, USA |
HeBIS-PPN: | 316106186 |
Institutes: | Physik / Physik |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Sammlungen: | Universitätspublikationen |
Licence (German): | Creative Commons - Namensnennung-Keine kommerzielle Nutzung-Weitergabe unter gleichen Bedingungen |