Deeply inelastic pions in the exclusive reaction $p(e,e'π^+)n$ above the resonance region

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dc.creatorKaskulov, Murat M.
dc.creatorGallmeister, Kai
dc.creatorMosel, Ulrich
dc.date2008-04-11
dc.date2009-01-07
dc.date.accessioned2026-07-07T12:24:46Z
dc.date.available2026-07-07T12:24:46Z
dc.descriptionA model for the $p(e,e'π^+)n$ reaction which combines an improved treatment of gauge invariant meson--exchange currents and hard deep--inelastic scattering (DIS) of virtual photons off nucleons is proposed. It is shown that DIS dominates and explains the transverse response at moderate and high photon virtualities $Q^2$ whereas the longitudinal response is dominated by hadronic degrees of freedom and the pion electromagnetic form factor. This leads to a combined description of the longitudinal and transverse components of the cross section in a wide range of photon virtuality $Q^2$ and momentum transfer to the target $t$ and solves the longstanding problem of the observed large transverse cross sections. The latter are shown to be sensitive to the intrinsic transverse momentum distribution of partons.
dc.description6 pages, 4 figures. published version
dc.identifierhttps://arxiv.org/abs/0804.1834
dc.identifierhttp://arxiv.org/abs/0804.1834
dc.identifierPhys.Rev.D78:114022,2008
dc.identifierdoi:10.1103/PhysRevD.78.114022
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/214428
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.subjectNuclear Theory
dc.titleDeeply inelastic pions in the exclusive reaction $p(e,e'π^+)n$ above the resonance region
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