Vector meson masses in 2+1 flavor Wilson Chiral Perturbation Theory
نویسنده
چکیده
We calculate the vector meson masses in Nf = 2+ 1 Wilson chiral perturbation theory at next-to-leading order. Generalizing the framework of heavy vector meson chiral perturbation theory, the quark mass and the lattice cutoff dependence of the vector meson masses is derived. Our chiral order counting assumes that the lattice cut-off artifacts are of the order of the typical pion momenta, p ∼ aΛ2QCD. This counting scheme is consistent with the one in the pseudo scalar meson sector where the O(a) terms are included in the leading order chiral Lagrangian. PACS numbers: 11.30.Hv, 11.30.Rd, 12.39.Fe, 12.38.Gc Present address: Institut für Physik, Humboldt Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany.
منابع مشابه
Recent results on screening masses
Recent results for screening masses at high temperature are presented. The spatial correlation functions of operators with meson quantum numbers were obtained on quenched gauge configurations with non-perturbatively improved Wilson quarks as well as, in a different round of analysis, on the NF = 2+1 configurations generated in the course of RBC-Bielefeld’s analysis of the Equation of State. Whi...
متن کاملPQChPT with Staggered Sea and Valence Ginsparg-Wilson Quarks: Vector Meson Masses
We consider partially quenched, mixed chiral perturbation theory with staggered sea and Ginsparg-Wilson valence quarks in order to extract a chiral-continuum extrapolation expression for the vector meson mass up to order O(a2), at one-loop level. Based on general principles, we accomplish the task without explicitly constructing a sophisticated, heavy vector meson chiral Lagrangian. PACS number...
متن کاملVector Meson Masses in Chiral Perturbation Theory
We discuss the vector meson masses within the context of Chiral Perturbation Theory performing an expansion in terms of the momenta, quark masses and 1/Nc. We extend the previous analysis to include isospin breaking effects and also include up to order p. We discuss vector meson chiral perturbation theory in some detail and present a derivation from a relativistic lagrangian. The unknown coeffi...
متن کاملQuenched Chiral Perturbation Theory for Vector Mesons
We develop quenched chiral perturbation theory for vector mesons made of light quarks, in the limit where the vector meson masses are much larger than the pion mass. We use this theory to extract the leading nonanalytic dependence of the vector meson masses on the masses of the light quarks. By comparing with analogous quantities computed in ordinary chiral perturbation theory, we estimate the ...
متن کاملar X iv : h ep - l at / 0 40 90 43 v 1 1 1 Se p 20 04 Chiral extrapolations with small sea quark mass data in two - flavor lattice
We present results on the light hadron spectrum and quark mass in two-flavor QCD calculated with small sea quark masses down to mP S /mV = 0.35. The configurations are generated using the RG improved gauge and tadpole-improved clover quark action at β = 1.8, where a −1 ≃ 1 GeV. Chiral extrapolations are made using not only polynomials and ChPT in the continuum but also formulae of Wilson chiral...
متن کامل