On Exclusive Reactions in the Time-Like Region

Details On Exclusive Reactions in the Time-Like Region On Exclusive Reactions in the Time-Like Region

1993-05-12

arxiv.org/abs/hep-ph/9305251v2

Phys.Lett. B316 (1993) 546-554

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, CERN-TH.6869/93; WU-B 93-06, latex, 3 figures as tar-compressed and uuencoded files, replaced version because the fig

Scientific paper

10.1016/0370-2693(93)91042-L

The electromagnetic form factors of the proton in the time-like region and two-photon annihilations into proton-antiproton are investigated. To calculate these processes at moderately large $s$ we use a variant of the Brodsky-Lepage hard-scattering formalism where diquarks are considered as quasi-elementary constituents of baryons. The proton wave function and the parameters controlling the diquark contributions are determined from fits to space-like data. We also comment on the decay $\eta_c \to p\bar{p}$.

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