Quark mass and flavor dependence of the QCD phase transition
Dec, 200025 pages
Published in:
- Nucl.Phys.B 605 (2001) 579-599
e-Print:
- hep-lat/0012023 [hep-lat]
Report number:
- BI-TP-2000-41
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Abstract:
We analyze the quark mass and flavour dependence of the QCD phase transition temperature. When the lightest pseudo-scalar meson mass (m_PS) is larger than 2 GeV the critical temperature is controlled by the gluonic sector of QCD alone. For smaller values of the lightest meson mass the pseudo-critical temperature decreases slowly with m_PS. For a large regime of meson masses the pseudo-critical temperature of 2-flavour QCD is about 10% larger than in the 3-flavour case. On lattices with temporal extent N_t=4 an extrapolation to the chiral limit yields T_c = 173(8) MeV and 154(8) MeV for 2 and 3-flavour QCD, respectively. We also analyze dynamical quark mass effects on the screening of the heavy quark potential. A detailed analysis of the heavy quark free energy in 3-flavour QCD shows that close to T_c screening effects are approximately quark mass independent already for pseudo-scalar meson masses m_PS = 800 MeV and screening sets in at distances r = 0.3 fm.Note:
- 25 pages, LaTeX2e File, 11 EPS-files Report-no: BI-TP 2000/41
- 11.15.Ha
- 12.38.Gc
- 12.38.Mh
- QCD
- Critical temperature
- Screening
- Flavour dependence
- fermion: lattice field theory
- lattice field theory: action
- gauge field theory: SU(3)
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