The QCD transition temperature: Results with physical masses in the continuum limit
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Tartalom: http://hdl.handle.net/10831/49418
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Cím:
The QCD transition temperature: Results with physical masses in the continuum limit
Létrehozó:
Aoki, Y
Fodor, Z
Katz, SD
Szabo, KK
Dátum:
2006
Tartalmi leírás:
The transition temperature (T-c) of QCD is determined by Symanzik improved gauge and stout-link improved staggered fermionic lattice simulations. We use physical masses both for the light quarks (m(ud)) and for the strange quark (m(s)). Four sets of lattice spacings (N-t = 4, 6, 8 and 10) were used to carry out a continuum extrapolation. It turned out that only N-t = 6, 8 and 10 can be used for a controlled extrapolation, N-t = 4 is out of the scaling region. Since the QCD transition is a non-singular cross-over there is no unique T-c. Thus, different observables lead to different numerical T-c values even in the continuum and thermodynamic limit. The peak of the renormalized chiral susceptibility predicts T-c = 151(3)(3) MeV, wheres T-c-s based on the strange quark number susceptibility and Polyakov loops result in 24(4) MeV and 25(4) MeV larger values, respectively. Another consequence of the cross-over is the non-vanishing width of the peaks even in the thermodynamic limit, which we also determine. These numbers are attempted to be the full result for the T not equal 0 transition, though other lattice fermion formulations (e.g. Wilson) are needed to cross-check them. (c) 2006 Elsevier B.V. All rights reserved.
Típus:
info:eu-repo/semantics/article
Formátum:
application/pdf
Azonosító:
doi:10.1016/j.physletb.2006.10.021
elte:000242542400009
elte:33750953636
elte:1424574
elte:1
elte:PHYS LETT B
elte:PHYSICS LETTERS B
elte:643
elte:10067248
Létrehozó:
info:eu-repo/semantics/openAccess