Journal ArticleDOI
Chiral symmetry breaking and perturbative QCD
TLDR
In this paper, it was shown that any combination of propagators that vanishes at zero momentum by virtue of Ward identifies is free of subtractions and satisfies a superconvergence relation.About:
This article is published in Physics Letters B.The article was published on 1981-05-28. It has received 124 citations till now. The article focuses on the topics: Chiral perturbation theory & Chiral symmetry breaking.read more
Citations
More filters
Journal ArticleDOI
The scalar form factor in the exclusive semi-leptonic decay of B→π+τ+ντ
TL;DR: In this paper, the Callan-Treiman type relation for the scalar form factor in the exclusive semi-leptonic decay was derived using current algebra and soft pion theory.
Journal ArticleDOI
Mathematical foundations of the dimensional method
TL;DR: In this paper, the uniqueness of the ϵμνστ tensor in n dimensions and its uniqueness of γ5 were discussed and an algorithm which allows the calculation of a set of scalar multi-loop integrals with masses in a systematic way was developed.
Journal ArticleDOI
correction to ƒB
TL;DR: In this article, the 1/m corrections to the B-meson decay constant ǫB and the D-mesone decay constant DǫD of the heavy quark effective theory were calculated in the Green function approach.
Journal ArticleDOI
XYZ-SU3 breakings from Laplace sum rules at higher orders
TL;DR: In this article, the authors present new integrated expressions of SU3 breaking corrections to QCD spectral functions of heavy-light molecules and four-quark XY Z-like states at lowest order (LO) of perturbative (PT) QCD and up to d = 8 condensates of the Operator Product Expansion (OPE).
Journal ArticleDOI
Upper bounds on f D and f D s from two-point correlation function in QCD
TL;DR: In this paper, the authors employed the correlation function of two charmed quark currents with a positive hadronic spectral density to obtain upper bounds on the decay constants of D and D{sub s} mesons.
References
More filters
Journal ArticleDOI
QCD and resonance physics. theoretical foundations
TL;DR: In this paper, a systematic study is made of the non-perturbative effects in quantum chromodynamics, where the basic object is the two-point functions of various currents and the terms of this series are shown to be of two distinct types.
Journal ArticleDOI
QCD and Resonance Physics: Applications
TL;DR: In this article, the dispersion charmonium theory was extended to include power terms due to the nonperturbative effects of QCD, and an estimate for the gluonic vacuum expectation value was derived.
Journal ArticleDOI
QCD and resonance physics: The ϱ-ω mixing
TL;DR: In this paper, the authors extended the QCD-based approach to cover the ϱ-ω mixing problem and showed that virtual photon exchanges alone cannot explain the observed value of the mixing parameter.
Journal ArticleDOI
Spectral function sum rules in quantum chromodynamics: (I). Charged currents sector
TL;DR: In this article, the Weinberg sum rules of the algebra of currents are reconsidered in the light of quantum chromodynamics (QCD), and new finite-energy sum rules are derived which replace the old Weinberg sums rules.
Journal ArticleDOI
QCD contribution to vacuum polarization: The pseudoscalar unequal mass case
TL;DR: In this article, the perturbative and non-perturbative contributions to the vacuum polarization from the pseudoscalar current in the unequal mass case were computed to first order in α s.