Low-energy pions in nuclear matter and 2pi photoproduction within a BUU transport model

Details Low-energy pions in nuclear matter and 2pi photoproduction within a BUU transport model Low-energy pions in nuclear matter and 2pi photoproduction within a BUU transport model

2006-03-02

arxiv.org/abs/nucl-th/0603003v2

Eur.Phys.J.A29:189-207,2006

Physics

Nuclear Physics

Nuclear Theory

22 pages, 20 figures Replaced with a revised version. Accepted for publication in EPJ A. Added a short section on pion reactio

Scientific paper

10.1140/epja/i2006-10075-y

A description of low-energy scattering of pions and nuclei within a BUU transport model is presented. Implementing different scenarios of medium modifications, the mean free path of pions in nuclear matter at low momenta and pion absorption reactions on nuclei have been studied and compared to data and to results obtained via quantum mechanical scattering theory. We show that even in a regime of a long pionic wave length the semi-classical transport model is still a reliable framework for pion kinetic energies greater than ~20-30 MeV. Results are presented on pion-absorption cross sections in the regime of 10 MeV < E(kin) < 130 MeV and on photon-induced double-pion production at incident beam energies of 400-500 MeV.

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