Quark-mass dependence ofTcin QCD: Working up fromm=0or down fromm=∞?
نویسندگان
چکیده
منابع مشابه
Determination of the temperature dependence of the up- down-quark mass in QCD
The temperature dependence of the sum of the QCD upand down-quark masses, (mu +md) and the pion decay constant, fπ , are determined from two thermal finite energy QCD sum rules for the pseudoscalar-current correlator. This quark-mass remains mostly constant for temperatures well below the critical temperature for deconfinement/chiral-symmetry restoration. As this critical temperature is approac...
متن کاملQuark mass dependence of two-flavor QCD
I explore the rich phase diagram of two-flavor QCD as a function of the quark masses. The theory involves three parameters, including one that is CP violating. As the masses vary, regions of both firstand second-order transitions are expected. For nondegenerate quarks, nonperturbative effects cease to be universal, leaving individual quark mass ratios with a renormalization scheme dependence. T...
متن کاملQuark mass dependence of hadron spectrum in holographic QCD
We compute a shift of baryon mass spectra due to quark masses in perturbation, in Sakai-Sugimoto model of holographic QCD. We find the shift for the ground state nucleons to be δM = 4.1 mπ GeV , which is consistent with the current lattice QCD result. We predict the same value of the shift for N(1535) and ∆, while a larger value 7.7 mπ GeV −1 for Roper N(1440). We also present some evidences th...
متن کاملQuark Mass and Flavour Dependence of the QCD Phase Transition
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 ...
متن کاملQuark mass dependence of hadron masses from lattice QCD
We discuss lattice methods to obtain the derivatives of a lattice meson mass with respect to the bare sea and valence quark masses. Applications are made to quenched and dynamical fermion configurations. We find evidence for significant differences between quenched and dynamical fermion configurations. We discuss how to relate dependence on the bare lattice parameters to more phenomenologically...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2004
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.70.074001