Cross sections for hard exclusive electroproduction of pi+ mesons on a hydrogen target

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dc.creatorHERMES Collaboration
dc.creatorAirapetian, A.
dc.date2007-07-02
dc.date2007-11-29
dc.date.accessioned2026-07-07T11:17:24Z
dc.date.available2026-07-07T11:17:24Z
dc.descriptionThe exclusive electroproduction of pi+ mesons was studied with the Hermes spectrometer at the DESY laboratory by scattering 27.6 GeV positron and electron beams off an internal hydrogen gas target. The virtual-photon cross sections were measured as a function of the Mandelstam variable t and the squared four momentum -Q^2 of the exchanged virtual photon. A model calculation based on Generalized Parton Distributions is in fair agreement with the data at low values of |t| if power corrections are included. A model calculation based on the Regge formalism gives a good description of the magnitude and the t and Q^2 dependences of the cross section.
dc.description7 pages, 5 figures, revised text
dc.identifierhttps://arxiv.org/abs/0707.0222
dc.identifierhttp://arxiv.org/abs/0707.0222
dc.identifierPhys.Lett.B659:486-492,2008
dc.identifierdoi:10.1016/j.physletb.2007.11.079
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/192998
dc.subjectHigh Energy Physics - Experiment
dc.titleCross sections for hard exclusive electroproduction of pi+ mesons on a hydrogen target
dc.typetext

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