Virtual and real pions in nuclei

The role of pionic degrees of freedom in photoreactions on nuclei is investigated. It is shown that the enhancement of the nuclear photoabsorption dipole cross section, given by exchange effects due to virtual pions, is accompanied by a parallel, almost compensating, hindrance with respect to the fr...

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Bibliographic Details
Published in:Physics letters. B 1984-01, Vol.146 (6), p.375-378
Main Author: Christillin, P.
Format: Article
Language:English
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Summary:The role of pionic degrees of freedom in photoreactions on nuclei is investigated. It is shown that the enhancement of the nuclear photoabsorption dipole cross section, given by exchange effects due to virtual pions, is accompanied by a parallel, almost compensating, hindrance with respect to the free case in the photoproduction of real pions above threshold.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(84)90142-4