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The soft and the hard pomerons in hadron elastic scattering at small t
J. R. Cudell, A. Lengyel, E. Martynov
We consider simple-pole descriptions of soft elastic scattering for pp, pbar p, pi+ p, pi- p, K+ p and K- p. We work at t and s small enough for rescatterings to be neglected, and…
Elastic Meson-Nucleon and Nucleon-Nucleon Scattering: Models vs. All Available Data
E. Martynov, J. R. Cudell, A. Lengyel
We consider simple-pole descriptions of soft elastic scattering at small and , and allow for the presence of a hard pomeron. We have built and analyzed an exhaustive dataset…
Hard pomeron contribution to forward elastic scattering
J. R. Cudell, A. Lengyel, E. Martynov +1
The introduction of a hard singularity in fits to total cross sections and to the ratio of real to imaginary parts enables to reproduce perfectly the data for sqrt(s)< 100 GeV usin…
A toy model for generalised parton distributions
J. R. Cudell, F. Bissey, J. Cugnon +3
We give the results of a simple model for the diagonal and off-diagonal valence quark distributions of a pion. We show that structure can be implemented in a gauge-invariant manner…
New contributions to heavy-quarkonium production
J. P. Lansberg, J. R. Cudell, Yu. L. Kalinovsky
We reconsider quarkonium production in a field-theoretical setting and we show that the lowest-order mechanism for heavy-quarkonium production receives in general contributions fro…
A review of the hard pomeron in soft diffraction
J. R. Cudell, A. Lengyel, E. Martynov +1
We review the evidence for the presence of a hard singularity in soft forward amplitudes, and give an estimate of its trajectory and couplings.