252 research outputs found
Once more on electromagnetic form factors of nucleons in extended vector meson dominance model
Extended vector meson dominance model, that allows to describe the
electromagnetic form factors of nucleons obeying the asymptotic quark counting
rule prescriptions and contains the minimal number of free parameters, is
presented. We get a reasonable fit of form factors over experimentally
available space-like region of momentum transfer and get also reasonable
results in the time-like region.Comment: 7 pages, 2 figure
Exclusive production in proton-proton collisions in the resonance model
The exclusive meson production in proton-proton reactions is
calculated within the resonance model. The considered model was already
successfully applied to the description of , , , ,
production in proton-proton collisions. The only new parameter
entering into the model is the mixing angle which
is taken equal to .Comment: 7 pages, 1 figure, to appear in the brief report section of PR
Medium modifications of kaons in pion matter
Kaon in-medium masses and mean-field potentials are calculated in
isotopically symmetric pion matter to one loop of chiral perturbation theory.
The results are extended to RHIC temperatures using experimental data on scattering phase shifts. The kaon in-medium broadening results in an
acceleration of the decay. The increased apparent dilepton
branching of the -mesons, observed recently by NA50, NA49, and the
PHENIX collaborations at RHIC, is interpreted in terms of rescattering of
secondary kaons inside of the pion matter.Comment: 5 pages, 2 figures, revised version accepted for publication in PR
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