Abstract
We present results on the QCD equation of state, obtained with two different improved dynamical staggered fermion actions and almost physical quark masses. Lattice cut-off effects are discussed in detail as results for three different lattice spacings are available now, i.e. results have been obtained on lattices with temporal extent of N τ =4,6 and 8. Furthermore we discuss the Taylor expansion approach to non-zero baryon chemical potential and present the isentropic equation of state on lines of constant entropy per baryon number.
Similar content being viewed by others
References
M. Cheng et al., Phys. Rev. D 77, 014511 (2008)
HotQCD Collaboration, in preparation
C. Detar, R. Gupta (HotQCD Collaboration), PoS LAT2007, 179 (2007)
F. Karsch (RBC Collaboration and HotQCD Collaboration), arXiv:0804.4148 [hep-lat]
K. Symanzik, Nucl. Phys. B 226, 187 (1983)
K. Symanzik, Nucl. Phys. B 226, 205 (1983)
S. Naik, Nucl. Phys. B 316, 238 (1989)
F. Karsch, E. Laermann, A. Peikert, Nucl. Phys. B 605, 579 (2001)
B. Sheikholeslami, R. Wohlert, Nucl. Phys. 259, 572 (1985)
P. Hasenfratz, F. Niedermayer, Nucl. Phys. B 414, 785 (1994)
P. Hasenfratz, S. Hauswirth, K. Holland, T. Jorg, F. Niedermayer, U. Wenger, Int. J. Mod. Phys. C. 12, 691 (2001)
W. Bietenholz, U.-J. Wiese, Nucl. Phys. B 464, 319 (1996)
P. Hegde, F. Karsch, E. Laermann, S. Shcheredin, Eur. Phys. J. C 55, 423 (2008)
I. Hováth, A.D. Kennedy, S. Sint, Nucl. Phys. B 73, 834 (1999)
M.A. Clark, A.D. Kennedy, Z. Sroczynski, Nucl. Phys. Proc. Suppl. 140, 835 (2005)
C. Aubin et al., Phys. Rev. D 70, 094505 (2004)
A. Gray et al., Phys. Rev. D 72, 094507 (2005)
C. Bernard et al., Phys. Rev. D 75, 094505 (2007)
S. Ejiri, PoS LAT2008, 002 (2008) arXiv:0812.1534 [hep-lat]
M.P. Lombardo, J. Phys. G 35, 104019 (2008)
C. Schmidt, PoS LAT2006, 021 (2006)
C.R. Allton, M. Doring, S. Ejiri, S.J. Hands, O. Kaczmarek, F. Karsch, E. Laermann, K. Redlich, Phys. Rev. D 71, 054508 (2005)
C.R. Allton et al., Phys. Rev. D 66, 074507 (2002)
C. Miao, C. Schmidt, PoS LAT2007, 175 (2007)
C. Bernard et al., Phys. Rev. D 77, 014503 (2008)
S. Ejiri, F. Karsch, E. Laermann, C. Schmidt, Phys. Rev. D 73, 054506 (2006)
J. Cleymans, K. Redlich, Phys. Rev. Lett. 81, 5284 (1998)
J. Cleymans, K. Redlich, Phys. Rev. C 60, 054908 (1999)
J. Cleymans, H. Oeschler, K. Redlich, S. Wheaton, Phys. Rev. C 73, 034905 (2006)
C.M. Hung, E. Shuryak, Phys. Rev. D 57, 1891 (1998)
V.D. Toneev, J. Cleymans, E.G. Nikonov, K. Redlich, A.A. Shanenko, J. Phys. G 27, 827 (2001)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Schmidt, C. Lattice QCD thermodynamic results with improved staggered fermions. Eur. Phys. J. C 61, 537–543 (2009). https://doi.org/10.1140/epjc/s10052-009-0882-9
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1140/epjc/s10052-009-0882-9