Spectral moments of two-point correlators in perturbation theory and beyond
نویسندگان
چکیده
منابع مشابه
Spectral moments of two-point correlators in perturbation theory and beyond
We discuss the choice of weight functions for the moments of the spectral density for twopoint correlators of hadronic currents over a finite energy interval. Of phenomenological relevance is an analysis of the spectra of τ lepton decay on the energy interval [0,Mτ ] and the low-energy hadron production in e+e− annihilation. General arguments are given for the calculability of such moments in p...
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چکیده ندارد.
15 صفحه اولMatching Current Correlators in Lattice QCD to Chiral Perturbation Theory
Chiral perturbation theory gives direct and unambiguous predictions for the form of various two-point hadronic correlators at low momentum in terms of a finite set of couplings in a chiral Lagrangian. In this paper we study the feasibility of extracting the couplings in the chiral Lagrangian (through 1-loop order) by fitting two-point correlators computed in lattice QCD to the predicted chiral ...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2002
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.65.036001