Refined analysis of photon leptoproduction off a spinless target

Andrei Belitsky, D. Müller

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We calculate the differential cross section for real-photon electroproduction off a spinless hadron which serves as a main probe of the hadrons structure via the concept of generalized parton distributions. Compared to previously available computations performed with twist-three power accuracy, we exactly accounted for all kinematical effects in hadron mass and momentum transfer which arise from leptonic helicity amplitudes. We performed numerical studies of these kinematical effects and demonstrated that in the valence quark region and rather low virtualities of the hard photon which sets the factorization scale, the available approximate results significantly overestimate the cross section rates in comparison to exact formulas.

Original languageEnglish (US)
Article number014017
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume79
Issue number1
DOIs
StatePublished - Jan 5 2009

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cross sections
photons
factorization
hadrons
partons
mass transfer
momentum transfer
quarks
valence
probes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Refined analysis of photon leptoproduction off a spinless target. / Belitsky, Andrei; Müller, D.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 79, No. 1, 014017, 05.01.2009.

Research output: Contribution to journalArticle

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