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28 papers · 2 filters
Excited Baryons in the 1/N_c Expansion
N. Matagne, Fl. Stancu
We review results for the mass spectrum of orbitally excited baryons obtained in the expansion. We show the dependence of various contributions to the mass operator as a fu…
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…
A QCD analysis of \bar p N -> gamma^* pi and \bar p N -> gamma^* gamma. Where is the pion in the proton ?
B. Pire, L. Szymanowski
We study the scaling regime of nucleon-anti-nucleon annihilation into a deeply virtual photon and a photon or meson, \bar p N -> gamma ^* pi, \bar p N -> gamma ^* gamma, in the for…
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…
BFKL resummation effects in gamma* gamma* --> rho rho
R. Enberg, B. Pire, L. Szymanowski +1
We calculate the leading order BFKL amplitude for the exclusive diffractive process γ*_L(Q1^2) γ*_L(Q2^2) \to ρ_L^0 ρ_L^0 in the forward direction, which can be studied in future h…