Chiral behavior of pseudo-Goldstone boson masses and decay constants in 2+1 flavor QCD
نویسندگان
چکیده
S. Dürr1, Z. Fodor1,2,3, C. Hoelbling2,5, S.D. Katz2,3, S. Krieg2,4, Th. Kurth2, L. Lellouch∗,5, Th. Lippert1,2,4, K.K. Szabo2, G. Vulvert5 1John von Neumann Institute for Computing (NIC), DESY, D-15738, Zeuthen / FZJ, D-52425, Juelich, Germany 2Department of Physics, University of Wuppertal, D-42097 Wuppertal, Germany 3Institute for Theoretical Physics, Eötvös University, H-1117 Budapest, Hungary 4Jülich Supercomputing Center (JSC), Forschungszentrum Jülich, D-52425 Jülich, Germany 5Centre de Physique Théorique, Case 907, Campus de Luminy, F-13288 Marseille Cedex 9, France†
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 ...
متن کاملLattice QCD data versus Chiral Perturbation Theory: the case of Mπ
I present a selection of recent lattice data by major collaborations for the pseudo-Goldstone boson masses in full (Nf =2) QCD, where the valence quarks are chosen exactly degenerate with the sea quarks. At least the more chiral points should be consistent with Chiral Perturbation Theory for the latter to be useful in extrapolating to physical masses. Perspectives to reliably determine NLO Gass...
متن کاملQuark mass dependence of masses and decay constants of the pseudo-Goldstone bosons in QCD
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...
متن کاملar X iv : h ep - p h / 01 05 13 2 v 1 1 5 M ay 2 00 1 U ( 3 ) chiral perturbation theory with infrared regularization 1
We include the η′ in chiral perturbation theory without employing 1/Nc counting rules. The method is illustrated by calculating the masses and decay constants of the Goldstone boson octet (π,K, η) and the singlet η′ up to one-loop order. The effective Lagrangian describing the interactions of the η′ with the Goldstone boson octet is presented up to fourth chiral order and the loop integrals are...
متن کاملQuenched Chiral Perturbation Theory
Partially quenched theories are theories in which the valenceand seaquark masses are different. In this paper we calculate the nonanalytic one-loop corrections of some physical quantities: the chiral condensate, weak decay constants, Goldstone boson masses, BK and the K + → π+π0 decay amplitude, using partially quenched chiral perturbation theory. Our results for weak decay constants and masses...
متن کامل