Pion absorption on sup 3 He: Absorption amplitude in the Faddeev-quasiparticle scheme

Journal Article · Fri Nov 01 04:00:00 EST 1991 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.44.1784· OSTI ID:5098847

Cattapan, G; Canton, L ^[1]

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1. Dipartimento di Fisica, Universita di Padova, Istituto Nazionale di Fisica Nucleare, Via Marzolo 8, Padova I-35131 (Italy)

The absorption channel in {pi}-{sup 3}He collisions is investigated. Amplitudes are derived for the pion-induced breakup of the target into both two clusters and three free nucleons. We employ elementary absorption mechanisms of one- and two-body type, which are presently considered to be important for the description of {pi}-nucleus collisions from the low-energy region up to the region dominated by the {Delta} resonance. We put the major emphasis on the few-body aspects of the process, such as the three-nucleon dynamics in the final state, and the initial-state breakup of the bound nuclear system in presence of the pion. On the other hand, we neglect pion-nucleus correlations in the initial state, which would entail a complete four-body treatment of the process. For both one- and two-body elementary absorption, the full amplitudes are explicitly represented through quasiparticle (Sturmian) expansions. The entire set of graphs corresponding to the present model is given and discussed.

• OSTI ID: 5098847
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 44:5; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653003* -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CAPTURE
CHARGED-PARTICLE REACTIONS
EQUATIONS
FADDEEV EQUATIONS
HADRON REACTIONS
HELIUM 3 TARGET
MESON REACTIONS
NUCLEAR REACTIONS
PION REACTIONS
TARGETS