Calculation of the Lepage-Mackenzie scale for the lattice axial-vector and vector currents
نویسندگان
چکیده
منابع مشابه
Divergence Conditions for Vector and Axial Vector Currents
Equations for the divergence of the vector and axial-vector currents follow from the assumptions of Lorentz invariance, locality, the chiral SU(3) X SU(3) algebra of current densities (time components), and the usual electromagnetic and weak Hamiltonians. The divergence conditions lead to derivations of the low-energy meson theorems which do not involve " Schwinger " terms.
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Axial-vector currents and τ mesonic decays
A general expression of the axial-vector current is presented, in which both the effects of the chiral symmetry breaking and the spontaneous chiral symmetry breaking are included. A new resonance formula of the axial-vector meson is derived and in the limit of q → 0 this formula doesn’t go back to the “chiral limit“. The studies show that the dominance of the axial-vector meson is associated wi...
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We present a quenched lattice calculation of f V /fV , the coupling of vector mesons to the tensor current normalized by the vector meson decay constant. The chirally improved lattice Dirac operator, which allows us to reach small quark masses, is used. We put emphasis on analyzing the quark mass dependence of f V /fV and find only a rather weak dependence. Our results at the ρ and φ masses agr...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1999
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.59.074506