1109.6374 (S. Fazio et al.)

Exclusive diffractive production of real photons and vector mesons in a
factorized Regge-pole model with non-linear Pomeron trajectory    [PDF]

S. Fazio, R. Fiore, L. Jenkovszky, A. Lavorini

Exclusive diffractive production of real photons and vector mesons in ep
collisions has been studied at HERA in a wide kinematic range. Here we present
and discuss a Regge-type model of real photon production (Deeply Virtual
Compton Scattering), as well as production of vector mesons (VMP) treated on
the same footing by using an extension of a factorized Regge-pole model
proposed earlier. The model has been fitted to the HERA data. Despite the very
small number of the free parameters, the model gives a satisfactory description
of the experimental data, both for the total cross section as a function of the
photon virtuality Q2 or the energy W in the center of mass of the gamma\star-p
system, and the differential cross sections as a function of the squared
four-momentum transfer t with fixed Q2 and W.

View original: http://arxiv.org/abs/1109.6374