NN-]NN-PI REACTION NEAR-THRESHOLD IN A COVARIANT ONE-BOSON-EXCHANGE MODEL

Authors
Citation
R. Shyam et U. Mosel, NN-]NN-PI REACTION NEAR-THRESHOLD IN A COVARIANT ONE-BOSON-EXCHANGE MODEL, Physics letters. Section B, 426(1-2), 1998, pp. 1-6
Citations number
39
Categorie Soggetti
Physics
Journal title
ISSN journal
03702693
Volume
426
Issue
1-2
Year of publication
1998
Pages
1 - 6
Database
ISI
SICI code
0370-2693(1998)426:1-2<1:NRNIAC>2.0.ZU;2-A
Abstract
We calculate the cross sections for the p(p,n pi(+))p and p(p,p pi(0)) p reactions for proton beam energies near threshold in a covariant one -boson-exchange model, which incorporates the exchange of pi, rho, sig ma and omega mesons, treats both nucleon and delta isobar as intermedi ate states. The final state interaction effects are included within th e Watson's theory. Within this model the omega and sigma meson exchang e terms contribute significantly at these energies, which, along with other meson exchanges, make it possible to reproduce the available exp erimental data for the total as well as differential cross sections fo r both the reactions. The cross sections at beam energies less than or equal to 300 MeV are found to be almost free from the contributions o f the Delta isobar excitation. (C) 1998 Elsevier Science B.V. All righ ts reserved.