{Delta}(1232)-nucleon interaction in the {sup 2}H(p,n) charge-exchange reaction
- Institut fuer Kernphysik, Forschungszentrum Juelich GmbH, D-52425 Juelich (Germany)
The {sup 2}H(p,n) charge exchange reaction at T{sub p}=790MeV is used to study the {Delta}(1232)-nucleon ({Delta}N) interaction in the {Delta} resonance excitation energy region. For the {Delta}N potential, a meson exchange model is adopted where {pi}, {rho}, {omega}, and {sigma} meson exchanges are taken into account. The deuteron disintegration below and above pion threshold is calculated using a coupled-channel approach. Various observables, such as the inclusive cross section, the quasifree {Delta} decay, the coherent pion production, and the two-nucleon breakup, are considered. It is shown that these observables are influenced by the dynamical treatment of the {Delta} degrees of freedom. Of special interest is the coherent pion decay of the {Delta} resonance, which is studied by means of the exclusive reaction {sup 2}H(p,n{pi}{sup +}){sup 2}H. Both the peak energy and the magnitude of the coherent pion production cross section depend very sensitively on the strength of the {Delta}N potential. The coherent pions have a peak energy of {omega}=300 MeV and a strongly forward peaked angular distribution. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 557621
- Journal Information:
- Physical Review, C, Journal Name: Physical Review, C Journal Issue: 4 Vol. 56; ISSN PRVCAN; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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