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Role of Delta exchange for proton-antiproton annihilation into two-pion and three-pion channels | | M. Betz
; E.A. Veit
; J. Haidenbauer
; | | Date: |
25 Mar 2002 | | Journal: | Eur.Phys.J. A14 (2002) 113-124 | | Subject: | nucl-th | | Abstract: | Proton-antiproton annihilation into two pions and three pions is studied in a baryon-exchange model. Annihilation diagrams involving nucleon as well as Delta-resonance exchanges are included consistently in the two- and three-pion channels. Effects from the initial-state interaction are fully taken into account. A comparison of the influence of the Delta exchange on the considered annihilation channels is made and reveals that its importance for three-pion annihilation is strongly reduced as compared to two-pion annihilation. It is found that annihilation into three uncorrelated pions can yield up to 10 % of the total experimentally observed three-pion annihilation cross section. | | Source: | arXiv, nucl-th/0203068 | | Services: | Forum | Review | PDF | Favorites | |
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