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Unified theory of. gamma. d. -->. np,. pi. /sup 0/d,. pi. NN, and pp. -->. pp. gamma. and the chiral bag model

Journal Article · · Phys. Rev. C; (United States)

A unified theory of photopion reactions in two-nucleon systems (..gamma..d..-->..pn, ..pi../sup 0/d, and ..pi..NN) and NN bremsstrahlung (NN..-->..NN..gamma..) is presented. By exposing the two-body (BB, where B = N or ..delta..(1232)) and three-body (..pi..BB and ..gamma..BB) unitarity, we derive a set of coupled integral equations to determine the amplitudes for these reactions. These equations have the same kernel as the equations one gets for the BB-..pi..BB system. The two-body input amplitudes are the result of a coupled channel unitary theory for ..pi..N..--> pi..N and pion photoproduction on a single baryon, within the framework of a gauge and chirally invariant Lagrangian, which is obtained from the chiral bag model Lagrangian. The renormalization due to the ..pi..B interaction is incorporated in a consistent manner.

Research Organization:
School of Physical Sciences, The Flinders University of South Australia, Bedford Park, South Australia 5042, Australia
OSTI ID:
7232124
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 38:1; ISSN PRVCA
Country of Publication:
United States
Language:
English