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
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$B$ Meson Decay Constants $f_{B_c}$, $f_{B_s}$ and $f_B$ from QCD Sum Rules
TL;DR: In this paper, a finite energy QCD sum rule with Legendre polynomial integration kernels was used to determine the heavy meson decay constant. But their results exhibit excellent stability in a wide range of values of the integration radius in the complex squared energy plane.
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Chiral corrections to the $SU(2)\times SU(2)$ Gell-Mann-Oakes-Renner relation
TL;DR: In this article, the pseudoscalar correlator to five-loop order in perturbative QCD, together with new finite energy sum rules (FESR) incorporating polynomial, Legendre type, integration kernels were used to suppress hadronic contributions in the region where they are least known.
Posted Content
Decay Constants of Heavy-Light Mesons from QCD
TL;DR: In this article, a novel extraction of this ratio from heavy quark effective theory (HQET) sum rules by including the normalization factor (M_b/M_B)^2 relating the pseudoscalar to the universal HQET correlators for finite b-quark and B-meson masses was presented.
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Improved two loop quark mass corrections
TL;DR: In this article, the authors show how to cancel mass singularities of the form m4log m through to O( alpha sm4log 2m), which arise in the evaluation of light-quark current correlators.
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Low-energy behaviour of two-point functions of quark currents
TL;DR: In this paper, the authors derived vector, axial-vector, scalar and pseudoscalar two-point functions at low and intermediate energies in the context of an extended Nambu-Jona-Lasinio (ENJL) model.
References
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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.
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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.
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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.
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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.
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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.