Quark mass dependence of masses and decay constants of the pseudo-Goldstone bosons in QCD
نویسندگان
چکیده
The dependence of the pseudoscalar meson masses and decay constants on sea and valence quark masses is compared to next-to-leading order (NLO) Chiral Perturbation Theory (ChPT). The numerical simulations with two light dynamical quark flavors are performed with the Wilson-quark lattice action at gauge coupling β = 5.1 and hopping parameters κ = 0.176, 0.1765, 0.177 on a 16 lattice. O(a) lattice artifacts are taken into account by applying chiral perturbation theory for the Wilson lattice action. The values of the relevant combinations of Gasser-Leutwyler constants L4, L5, L6 and L8 are estimated.
منابع مشابه
Quark mass dependence of pseudo-scalar masses and coupling constants
The dependence of pseudo-scalar masses and decay constants on the sea and valence quark masses is investigated in the pseudo-Goldstone boson sector of QCD with two light quark flavours. The sea quark masses are at present in the range 1 3 ms ≤ mud ≤ 2 3 ms whereas the valence quark masses satisfy 1 2 msea ≤ mval ≤ 2msea. The values of the Gasser-Leutwyler low energy constants L4, L5, L6 and L8 ...
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تاریخ انتشار 2003