Results 51 to 60 of about 1,708,127 (184)
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
Holographic model for heavy-vector-meson masses [PDF]
, 2015 The experimentally observed spectra of heavy-vector-meson radial excitations show a dependence on two different energy parameters. One is associated with the quark mass and the other with the binding energy levels of the quark-antiquark pair.
N. Braga +2 more
semanticscholar +1 more source
AIP Conference Proceedings, 2009 The rich experimental landscape of exclusive vector meson production at the high energy electron‐proton collider HERA is reviewed, with emphasis on the transition from soft to hard diffraction and perturbative QCD interpretations.
L. Favart +4 more
openaire +3 more sources
Vector meson and heavy meson strong interaction [PDF]
Physical Review D, 2009 We calculate the coupling constants between the light vector mesons and heavy mesons within the framework of the light-cone QCD sum rule in the leading order of heavy quark effective theory. The sum rules are very stable with the variations of the Borel parameter and the continuum threshold.
Lei Zhang, Peng-Zhi Huang, Shi-Lin Zhu
openaire +3 more sources
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
QCD description of backward vector meson hard electroproduction [PDF]
, 2015 We consider backward vector meson exclusive electroproduction off nucleons in the framework of collinear QCD factorization. Nucleon to vector meson transition distribution amplitudes arise as building blocks for the corresponding factorized amplitudes ...
B. Pire +2 more
semanticscholar +1 more source
Vector meson production in ultraperipheral collisions at the LHC [PDF]
Theoretical and mathematical physics, 2014 Using a Regge-pole model for vector meson production (VMP) that successfully describes the HERA data, we analyze the correlation between VMP cross sections in photon-induced reactions at HERA and those in ultraperipheral collisions at the large hadron ...
Roberto Fiore +3 more
semanticscholar +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