Results 31 to 40 of about 17,379 (194)

Weak magnetic field corrections to light vector or axial mesons mixings and vector meson dominance [PDF]

open access: yes, 2020
Weak magnetic field induced corrections to effective coupling constants describing light vector mesons mixings and vector meson dominance (VMD) are derived. The magnetic field must be weak with respect to an effective quark mass $M^*$ such that: $eB_0/{M^
F. Braghin
semanticscholar   +1 more source

Axial anomaly and vector meson dominance model [PDF]

open access: yesJETP Letters : Journal of Experimental And Theoretical Physics Letters, 2013
A connection between the axial anomaly and the vector meson dominance model is revealed for the processes of pseudoscalar meson-photon transitions. The analytic continuation of the anomaly sum rules, which are exact QCD relations following follow from ...
Y. Klopot, A. Oganesian, O. Teryaev
semanticscholar   +2 more sources

Cornering large-N c QCD with positivity bounds

open access: yesJournal of High Energy Physics, 2023
The simple analytic structure of meson scattering amplitudes in the large-N c limit, combined with positivity of the spectral density, provides precise predictions on low-energy observables.
Clara Fernandez   +3 more
doaj   +1 more source

Rare four leptonic B-mesons decays with a neutrino in final state [PDF]

open access: yesEPJ Web of Conferences, 2019
We revisit prediction for the four – leptonic decay of charged B - mesons in the Standard Model and provide an updated results for branching ratios and various differential distributions.
Danilina Anna   +2 more
doaj   +1 more source

Vector dominance, one flavored baryons, and QCD domain walls from the "hidden" Wess-Zumino term

open access: yesSciPost Physics, 2021
We further explore a recent proposal that the vector mesons in QCD have a special role as Chern-Simons fields on various QCD objects such as domain walls and the one flavored baryons.
Avner Karasik
doaj   +1 more source

Analysis of the b 1 meson decay in local tensor bilinear representation

open access: yesJournal of High Energy Physics, 2018
We explore the validity of vector meson dominance in the radiative decay of the b 1(1235) meson. In order to explain the violation of the vector meson dominance hypothesis in this decay process, we investigate a model where the b 1 meson strongly couples
Kie Sang Jeong   +2 more
doaj   +1 more source

Isoscalar and isovector kaon form factors from e+e− and τ data [PDF]

open access: yesEPJ Web of Conferences, 2019
The recent precise measurements of the e+e−→ KS KL and e+e−→ K+K− cross sections and the hadronic spectral function of the τ−→ K−KS ντ decay are used to extract the isoscalar and isovector electromagnetic kaon form factors and their relative phase in a ...
Beloborodov Konstantin   +2 more
doaj   +1 more source

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