Elastic electroproduction of
نویسندگان
چکیده
منابع مشابه
Measurement of elastic electroproduction of mesons at HERA H1 Collaboration
The elastic electroproduction of mesons is studied at HERA with the H1 detector for photon virtualities and hadronic centre of mass energies GeV. The and dependences of the cross section are extracted ( being the square of the four-momentum transfer to the target proton). When plotted as function of ( + ) and scaled by the appropriate SU(5) quark charge factor, the meson cross section agrees wi...
متن کاملDiffractive Electroproduction *
In the following, the term ‘diffractive electroproduction’ or ‘diffractive deep inelastic scattering (DIS)’ is used to characterize those processes in small-x DIS where, in spite of the high virtuality of the exchanged photon, the proton target remains intact or almost intact. Thus, the term is used synonymously with the expression ‘rapidity gap events in DIS’. Historically, the term diffractio...
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The unitary isobar model MAID has been extended and used for a partial wave analysis of pion photoand electroproduction in the resonance region W < 2 GeV. Older data from the world data base and more recent experimental results from Mainz, Bates, Bonn and JLab for Q up to 4.0 (GeV/c) have been analyzed and the Q dependence of the helicity amplitudes have been extracted for a series of four star...
متن کاملElectroproduction of Vector Mesons
Exclusive electroproduction of vector mesons (VMs) is a particularly good process for studying the transition from the soft to the hard regime of strong interactions [1], the former being well described within the Regge phenomenology while the latter by perturbative QCD (pQCD). The interest in this interplay comes from the need to understand at which scale a partonic language is applicable. The...
متن کاملExclusive Electroproduction of Pentaquarks
Exclusive electroproduction of a K or K * meson on the nucleon can give a Θ + pentaquark in the final state. This reaction offers an opportunity to investigate the structure of pentaquark baryons at parton level. We discuss the generalized parton distributions for the N → Θ + transition and give the leading order amplitude for electroproduction in the Bjorken regime.
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ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 2000
ISSN: 1434-6044
DOI: 10.1007/s100520050703