ar X iv : h ep - p h / 02 06 18 9 v 1 2 0 Ju n 20 02 1 Mass effects in hard exclusive photoproduction of J / Ψ mesons

ar X iv : h ep - p h / 02 07 27 2 v 1 2 3 Ju l 2 00 2 Photoproduction of vector mesons in the Soft Dipole Pomeron model

Exclusive photoproduction of all vector mesons by real and virtual photons is considered in the Soft Dipole Pomeron model. It is emphasized that being the Pomeron in this model a double Regge pole with intercept equal to one, we are led to rising cross-sections but the unitarity bounds are not violated. It is shown that all available data for ρ, ω, ϕ, J/ψ and Υ in the region of energies 1.7 ≤ W...

ar X iv : h ep - p h / 02 06 27 0 v 1 2 6 Ju n 20 02 1 The charge asymmetry from Pomeron - Odderon interference in hard

ar X iv : h ep - p h / 02 06 17 1 v 2 2 4 Ju n 20 02 IPHE 2002 - 009 June 24 , 2002 B 0 – B 0 MIXING

ar X iv : h ep - p h / 04 01 13 1 v 1 1 8 Ja n 20 04 Exclusive photoproduction of a heavy vector meson in QCD

The process of exclusive heavy vector meson photoproduction, γp → V p, is studied in the framework of QCD factorization. The mass of the produced meson, V = Υ or J/Ψ, provides a hard scale for the process. We demonstrate, that in the heavy quark limit and at the one-loop order in perturbation theory, the amplitude factorizes in a convolution of a perturbatively calculable hard-scattering amplit...

ar X iv : h ep - p h / 99 09 27 0 v 1 7 S ep 1 99 9 HARD EXCLUSIVE PHOTOPRODUCTION OF Φ

We consider the reaction γ p → M p, with M being either a Φ or a J/Ψ meson, within perturbative QCD treating the proton as a quark-diquark system. The phenomenological couplings of gauge bosons to (spatially extended) diquarks and the quark-diquark distribution amplitude of the proton are adopted from previous investigations of baryon form factors and two-photon processes. Going beyond leading ...