Results 21 to 30 of about 198,978 (237)
Exploration of trace anomaly contribution to proton mass based on light vector meson photoproduction
European Physical Journal C: Particles and Fields, 2023 In the quantum chromodynamics, the mass source of the proton is decomposed into four parts by the energy momentum tensor: quark energy term, gluon energy term, quark mass term and trace anomaly term.
Chen Dong +4 more
doaj +1 more source
$\eta \to \pi^0 \gamma \gamma$ decay within unitarized chiral perturbation theory [PDF]
, 2002 We improve the calculations of the $\eta \to \pi^0 \gamma \gamma$ decay within the context of meson chiral lagrangians. We use a chiral unitary approach for the meson-meson interaction, thus generating the $a_0(980)$ resonance and fixing the longstanding
A. A. Bel’kov +48 more
core +3 more sources
Radiative decays of vector and pseudoscalar nonets
EPJ Web of Conferences, 2012 Using a counting scheme which treats the light pseudoscalar and the light vector-meson nonet on equal footing, the decays of the narrow light vector mesons into a pseudoscalar meson and a dilepton and of the η′ meson into an ɷ meson and a dielectron are ...
Lutz M.F.M., Leupold S., Terschlüsen C.
doaj +1 more source
Cornering large-N c QCD with positivity bounds
Journal 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
Magnetic polarizabilities of light mesons in SU(3) lattice gauge theory
Nuclear Physics B, 2015 We investigate the ground state energies of neutral pseudoscalar and vector meson in SU(3) lattice gauge theory in the strong abelian magnetic field.
E.V. Luschevskaya +3 more
doaj +1 more source
Vector-meson dominance revisited
EPJ Web of Conferences, 2012 The interaction of mesons with electromagnetism is often well described by the concept of vector-meson dominance (VMD). However, there are also examples where VMD fails.
Terschlüsen Carla, Leupold Stefan
doaj +1 more source
Radiative decay into $γP$ of the low lying axial-vector mesons [PDF]
Phys.Rev.D77:034017,2008, 2008 We evaluate the radiative decay into a pseudoscalar meson and a photon of the whole set of the axial-vector mesons dynamically generated from the vector-pseudoscalar meson ($VP$) interaction. We take into account tree level and loop diagrams coming from the axial-vector decay into a vector and a pseudoscalar meson.
arxiv +1 more source
EPJ Web of Conferences, 2012 Photoproduction of vector mesons has been studied since the 1960’s and was instrumental in establishing the hadronic structure of the photon and the concept of vectormeson dominance.
Schäfer Wolfgang
doaj +1 more source
Poincaré-covariant quark model of electroweak light mesons decays [PDF]
EPJ Web of Conferences, 2019 The procedure for obtaining the radiative decay constants of pseudoscalar and vector unflavored mesons in point–form of Poincaré-invariant quantum mechanics is presented.
Andreev Viktor, Haurysh Vadzim
doaj +1 more source
Vector meson-vector meson interaction in a hidden gauge unitary approach [PDF]
, 2009 The formalism developed recently to study vector meson--vector meson interaction, and applied to the case of $\rho\rho$, is extended to study the interaction of the nonet of vector mesons among themselves. The interaction leads to poles of the scattering
A. I. Titov, E. Oset, L. S. Geng
core +3 more sources