Contribution of real and virtual Pions to nuclear Photoabsorption at Intermediate Energies

Details Contribution of real and virtual Pions to nuclear Photoabsorption at Intermediate Energies Contribution of real and virtual Pions to nuclear Photoabsorption at Intermediate Energies

1996-09-16

arxiv.org/abs/nucl-th/9609037v1

Physics

Nuclear Physics

Nuclear Theory

LaTex 15 pages, 11 figures

Scientific paper

The universal curve $\sigma /A$ of nuclear photoabsorption is investigated within a Fermi gas model of nuclear matter. An energy range from pion threshold up to 400 MeV is considered. The interactions between nucleon, pion, $\Delta $-isobar and photon are considered in the non-relativistic approximation with corrections of the order $1/M$ taken into account with respect to proton mass. Analytical expressions are obtained, in which the influence of nuclear correlations, two-nucleon contributions and relativistic corrections is studied explicitely. An extension of the model calculation to nucleon knock-out reactions is discussed.

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