The QCD thermal phase transition in the presence of a small chemical potential

Allton CR, Ejiri S, Hands SJ, Kaczmarek O, Karsch F, Laermann E, Schmidt C, Scorzato L (2002)
Phys.Rev. D 66(7): 74507.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Allton, C. R; Ejiri, S.; Hands, S. J; Kaczmarek, OlafUniBi; Karsch, FrithjofUniBi; Laermann, EdwinUniBi; Schmidt, ChristianUniBi; Scorzato, L.
Abstract / Bemerkung
We propose a new method to investigate the thermal properties of QCD with a small quark chemical potential $\mu$. Derivatives of the phase transition point with respect to $\mu$ are computed at $\mu=0$ for 2 flavors of p-4 improved staggered fermions with $ma=0.1,0.2$ on a $16^3\times4$ lattice. The resulting Taylor expansion is well behaved for the small values of $\mu_{\rm q}/T_c\sim0.1$ relevant for RHIC phenomenology, and predicts a critical curve $T_c(\mu)$ in reasonable agreement with estimates obtained using exact reweighting. In addition, we contrast the case of isoscalar and isovector chemical potentials, quantify the effect of $\mu\not=0$ on the equation of state, and comment on the complex phase of the fermion determinant in QCD with $\mu\not=0$.
Stichworte
pressure; potential: chemical; 11.15.Ha; 05.70.Ce; 12.38.Gc; 12.38.Mh; critical phenomena; energy: density; fermion: determinant; fermion: lattice field theory; finite temperature; flavor: 2; gauge field theory: SU(3); Lattice; numerical calculations: Monte Carlo; quark: mass
Erscheinungsjahr
2002
Zeitschriftentitel
Phys.Rev. D
Band
66
Ausgabe
7
Art.-Nr.
74507
ISSN
0556-2821
eISSN
1089-4918
Page URI
https://pub.uni-bielefeld.de/record/1968934

Zitieren

Allton CR, Ejiri S, Hands SJ, et al. The QCD thermal phase transition in the presence of a small chemical potential. Phys.Rev. D. 2002;66(7): 74507.
Allton, C. R., Ejiri, S., Hands, S. J., Kaczmarek, O., Karsch, F., Laermann, E., Schmidt, C., et al. (2002). The QCD thermal phase transition in the presence of a small chemical potential. Phys.Rev. D, 66(7), 74507. doi:10.1103/PhysRevD.66.074507
Allton, C. R., Ejiri, S., Hands, S. J., Kaczmarek, O., Karsch, F., Laermann, E., Schmidt, C., and Scorzato, L. (2002). The QCD thermal phase transition in the presence of a small chemical potential. Phys.Rev. D 66:74507.
Allton, C.R., et al., 2002. The QCD thermal phase transition in the presence of a small chemical potential. Phys.Rev. D, 66(7): 74507.
C.R. Allton, et al., “The QCD thermal phase transition in the presence of a small chemical potential”, Phys.Rev. D, vol. 66, 2002, : 74507.
Allton, C.R., Ejiri, S., Hands, S.J., Kaczmarek, O., Karsch, F., Laermann, E., Schmidt, C., Scorzato, L.: The QCD thermal phase transition in the presence of a small chemical potential. Phys.Rev. D. 66, : 74507 (2002).
Allton, C. R, Ejiri, S., Hands, S. J, Kaczmarek, Olaf, Karsch, Frithjof, Laermann, Edwin, Schmidt, Christian, and Scorzato, L. “The QCD thermal phase transition in the presence of a small chemical potential”. Phys.Rev. D 66.7 (2002): 74507.

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arXiv: hep-lat/0204010

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