1995/02/28 by J. Speth, V. R. Zoller · 1 citation
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(95)00445-q
published as Phys.Lett.B351:533-540,1995
arxiv created 1995/03/07 · openalex publication_date 1995/06/01 · arxiv updated 2010/11/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We apply the light-cone technique to electroproduction reaction ep→ eπ+n long considered as a means of measuring the electromagnetic form factor of the pion. We show that the interpretation of the long-standing puzzle of large transverse cross section (σT) in terms of the γ^*ρ→ π transition on the ρ mesons in the light-cone proton is possible, but requires quite a slow decrease of the Fρπ(\q2) form factor. This interpretation can be tested in the related ep→ eπ0p reaction. Corrections which are due to the final-state meson-baryon interactions (FSI) are evaluated and are shown to amount to a 25% effect at moderately large \q2. Vanishing FSI with increasing Q2 - the color transparency phenomenon - is shown to be very strong.