Equation of state of quark-gluon matter from lattice QCD with two flavors of twisted mass Wilson fermions

被引：20

作者：

Burger, Florian ^{[1
]}

Ilgenfritz, Ernst-Michael ^{[2
,3
]}

Lombardo, Maria Paola ^{[4
,5
]}

Mueller-Preussker, Michael ^{[1
]}

机构：

[1] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[2] Joint Inst Nucl Res, VBLHEP, Dubna 141980, Russia

[3] BLTP, Dubna 141980, Russia

[4] Ist Nazl Fis Nucl, Sez Pisa, I-56100 Pisa, Italy

[5] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-100044 Rome, Italy

来源：

PHYSICAL REVIEW D | 2015年 / 91卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.91.074504

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on lattice QCD results for the thermodynamic equation of state of quark-gluon matter obtained with N-f = 2 degenerate quark flavors. For the fermion field discretization we are using the Wilson twisted mass prescription. Simulations have been carried out at three values of the bare quark masses corresponding to pion masses of similar to 360, similar to 430 and similar to 640 MeV. We highlight the importance of a good control of the lattice cutoff dependence of the trace anomaly which we have studied at several values of the inverse temperature T-1 = aN(tau) with a timelike lattice extent up to N-tau = 12. We contrast our results with those of other groups obtained for N-f = 0 and N-f = 2 + 1. At low temperature we also confront them with hadron resonance gas model predictions for the trace anomaly.

引用

页数：23

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