Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-07-20
Few Body Syst.Suppl.8:133-144,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages (10 figures), TeX, Version 3.141 [PD VMS 3.4/CERN 1.0] (fbssuppl.sty and psfig.sty are used)
Scientific paper
In this talk we cover several issues concerning pion production. The first one is the p p ----> p p pi^0 reaction where an alternative explanation based on the off shell extrapolation of the pi N amplitude is offered. A recent model for the gamma N ----> pi pi N reaction is presented and a new kind of exchange current is constructed from it which allows one to address problems like double Delta photoproduction from the deuteron. Finally the (gamma, pi pi) reaction in nuclei is studied and shown to be highly sensitive to the renormalization of the pions in nuclei.
Cano Felipe
Gomez Tejedor J. A.
Hernandez Eduardo
Oset Eulogio
Vicente Vacas M. J.
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