Results 41 to 50 of about 17,379 (194)

HEAVY MESON RADIATIVE DECAYS AND LIGHT VECTOR MESON DOMINANCE [PDF]

International Journal of Modern Physics A, 1995
Electromagnetic interactions are introduced in the effective chiral Lagrangian for heavy mesons which includes light vector particles. A suitable notion of vector meson dominance is formulated. The constraints on the heavy meson-light vector and heavy meson-light pseudoscalar coupling constants are obtained using experimental D*→Dγ branching ratios ...
Schechter, Joseph, Jain, Pankaj, Momen, Arshad   +2 more
openaire   +2 more sources

Electromagnetic nucleon form factors in the extended vector meson dominance model [PDF]

Physical Review D
An extended vector meson dominance model is developed to describe electromagnetic nucleon form factors. The model includes families of the ρ- and ω-mesons with the associated radial excitations.
K. S. Kuzmin, N. Levashko, M. Krivoruchenko   +2 more
semanticscholar   +1 more source

Differential cross section for γd → ωd using CLAS at Jefferson Lab

Physics Letters B, 2018
The cross section for coherent ω-meson photoproduction off the deuteron has been measured for the first time as a function of the momentum transfer t=(Pγ−Pω)2 and photon energy Eγ using the CLAS detector at the Thomas Jefferson National Accelerator ...
T. Chetry, K. Hicks, N. Compton, M. Sargsian, S. Adhikari, J. Ball, I. Balossino, L. Barion, M. Battaglieri, V. Batourine, I. Bedlinskiy, A.S. Biselli, S. Boiarinov, W.J. Briscoe, W.K. Brooks, V.D. Burkert, D.S. Carman, A. Celentano, G. Charles, G. Ciullo, L. Clark, Brandon A. Clary, P.L. Cole, M. Contalbrigo, V. Crede, A. D'Angelo, N. Dashyan, R. De Vita, E. De Sanctis, A. Deur, C. Djalali, R. Dupre, A. El Alaoui, L. El Fassi, P. Eugenio, G. Fedotov, R. Fersch, A. Filippi, G. Gavalian, Y. Ghandilyan, K.L. Giovanetti, F.X. Girod, E. Golovatch, R.W. Gothe, K.A. Griffioen, L. Guo, K. Hafidi, N. Harrison, M. Hattawy, M. Holtrop, Y. Ilieva, D.G. Ireland, B.S. Ishkhanov, E.L. Isupov, D. Jenkins, S. Johnston, M.L. Kabir, D. Keller, G. Khachatryan, M. Khachatryan, M. Khandaker, A. Kim, W. Kim, F.J. Klein, V. Kubarovsky, L. Lanza, P. Lenisa, K. Livingston, I.J.D. MacGregor, N. Markov, B. McKinnon, V. Mokeev, A. Movsisyan, C. Munoz Camacho, P. Nadel-Turonski, S. Niccolai, G. Niculescu, M. Osipenko, A.I. Ostrovidov, M. Paolone, R. Paremuzyan, K. Park, E. Pasyuk, W. Phelps, O. Pogorelko, J.W. Price, Y. Prok, M. Ripani, D. Riser, B.G. Ritchie, A. Rizzo, G. Rosner, C. Salgado, R.A. Schumacher, Iu. Skorodumina, G.D. Smith, D.I. Sober, D. Sokhan, N. Sparveris, S. Stepanyan, I.I. Strakovsky, S. Strauch, M. Taiuti, J.A. Tan, M. Ungaro, H. Voskanyan, E. Voutier, L.B. Weinstein, M.H. Wood, N. Zachariou, J. Zhang, Z.W. Zhao   +111 more
doaj   +1 more source

Radiative corrections to the forward-backward asymmetry in e + e − → π + π −

Journal of High Energy Physics, 2022
We present a calculation of the C-odd radiative corrections to e + e − → π + π − in a dispersive formalism, concentrating on the leading pion-pole contribution in the virtual box diagrams.
Gilberto Colangelo, Martin Hoferichter, Joachim Monnard, Jacobo Ruiz de Elvira   +3 more
doaj   +1 more source

Axial-vector transition form factors and e + e − → f 1 π + π −

Journal of High Energy Physics, 2023
We study the transition form factors (TFFs) of axial-vector mesons in the context of currently available experimental data, including new constraints from e + e − → f 1(1285)π + π − that imply stringent limits on the high-energy behavior and, for the ...
Martin Hoferichter, Bastian Kubis, Marvin Zanke   +2 more
doaj   +1 more source

Dilepton production in proton-proton reaction at 4.5 GeV with the HADES spectrometer [PDF]

EPJ Web of Conferences
Spectra of dileptons emitted in hadron collisions are important tool to study electromagnetic decays of resonances and the validity of the Vector Meson Dominance model.
Abou Yassine Rayane
doaj   +1 more source

Hadronic properties of the photon [PDF]

EPJ Web of Conferences, 2019
Currently it is no doubt that high energy photons (real or virtual) have a hadronic component leading to photon shadowing in its interaction with nuclei.
Gevorkyan Sergey
doaj   +1 more source

η′ → π0γγ and ��′ → ηγγ: a primer analysis

EPJ Web of Conferences, 2012
The electromagnetic rare decays η′ → π0γγ and η′ → π0γγ are analysed for the first time and their predicted branching ratios given. The vector meson exchange dominant contribution is treated using Vector Meson Dominance and the scalar component is ...
Escribano Rafel
doaj   +1 more source

Leptophobic dark photon interpretation of the η(′)→π0(η)γγ puzzle

Physics Letters B, 2023
The decays of η and η′ mesons provide unique opportunities for testing the properties of low energy Quantum Chromodynamics and for the search of new physics beyond the Standard Model.
Yaroslav Balytskyi
doaj   +1 more source

Role of momentum dependent dressing functions and vector meson dominance in hadronic light-by-light contributions to the muon $g-2$ [PDF]

, 2012
We present a refined calculation of the quark-loop contribution to hadronic light-by-light scatter- ing that focuses upon the impact of the transverse components of the quark-photon vertex.
TO Goecke, C. Fischer, Richard Williams
semanticscholar   +1 more source