A covariant OBE model for η production in NN collisions
نویسندگان
چکیده
منابع مشابه
Instantons and η Meson Production near threshold in NN collisions
An enhancement for the η production in proton-neutron collisions as compared with that in proton-proton scattering has been recently observed. We present a calculation for the production cross section, in proton-neutron collisions near threshold, within instanton model for the QCD vacuum and show that a specific flavor dependent nonperturbative quark-gluon interaction related to instantons is a...
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The processes of open and hidden charm production in NN collisions and of open charm production in γN collisions are studied. The near-threshold cross section is predicted and polarization phenomena are calculated in frame of an effective Lagrangian approach.
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Di-electron production in N+N collisions at Ekin < 5 GeV/u was studied previously by the DLS collaboration [1] and have been available for about 10 years, although with limited statistics and mass resolution. Microscopic transport calculation, hovewer, never succeeded to explain the experimental data satisfactory until a strong bremsstrahlung contribution in n+p interactions has been recently p...
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A microscopic calculation of near-threshold η-meson production in the reaction N N → N N η is presented. It is assumed that the η meson is produced via direct emission and via elementary rescattering processes M N → ηN of various mesons M = π, ρ, etc. As a novel feature the amplitudes for the latter production mechanism are taken from a multi-channel meson-exchange model of the πN system develo...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 1998
ISSN: 0375-9474
DOI: 10.1016/s0375-9474(98)00152-3