On exclusive reactions in the time-like region

1993/05/17 by P. Kroll, Th. Pilsner, M. Schürmann +2 · 7 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/0370-2693(93)91042-l

published as Phys.Lett. B316 (1993) 546-554 · 8 pages, CERN-TH.6869/93; WU-B 93-06, latex, 3 figures as tar-compressed and uuencoded files, replaced version because the figures have been corrupted,([email protected])

arxiv created 1993/05/17 · openalex publication_date 1993/10/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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 η_c → pp.

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