Eur. Phys. J. A (2009) 39: 249-253
https://doi.org/10.1140/epja/i2008-10699-9

Regular Article - Theoretical Physics

On the multistep processes in the nuclei

Institute for Nuclear Research of the Academy of Sciences of Russia, 60th October Anniversary Prospect 7a, 117312, Moscow, Russia

Received: 13 August 2008
Revised: 30 October 2008
Accepted: 9 December 2008
Published online: 28 January 2009

Abstract

The intermediate-state interaction and the structure of amplitudes of complicated processes in the medium (decays, reactions and the n transitions) are studied. It is proposed to use the branching ratio of channels of the free-space hadron-nucleon interaction as a test in the construction and verification of the models. The corresponding formulas for the processes in the medium are obtained. The connection between the particle self-energy and amplitudes of subprocesses is analyzed as well.