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Generalized parton distributions and composite constituent quarks

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Generalized parton distributions and composite constituent quarks

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dc.contributor.author Scopetta, Sergio
dc.contributor.author Vento Torres, Vicente
dc.date.accessioned 2015-05-12T10:44:04Z
dc.date.available 2015-05-12T10:44:04Z
dc.date.issued 2004
dc.identifier.citation Scopetta, Sergio Vento Torres, Vicente 2004 Generalized parton distributions and composite constituent quarks Physical Review D 69 9 094004-1 094004-14
dc.identifier.uri http://hdl.handle.net/10550/43726
dc.description.abstract An approach is proposed to calculate Generalized Parton Distributions (GPDs) in a Constituent Quark Model (CQM) scenario, considering the constituent quarks as complex systems. The GPDs are obtained from the wave functions of the non relativistic CQM of Isgur and Karl, convoluted with the GPDs of the constituent quarks themselves. The latter are modelled by using the structure functions of the constituent quark, the double distribution representation of GPDs, and a recently proposed phenomenological constituent quark form factor. The present approach permits to access a kinematical range corresponding to both the DGLAP and the ERBL regions, for small values of the momentum transfer and of the skewedness parameter. In this kinematical region, the cross sections relevant to deeply virtual Compton scattering could be estimated by using the obtained GPDs. As an example, the leading twist, unpolarized GPD H has been calculated. Its general relations with the non relativistic definition of the electric form factor and with the leading twist unpolarized quark density are consistently recovered from our expressions.Further natural applications of the proposed approach are addressed.
dc.language.iso eng
dc.relation.ispartof Physical Review D, 2004, vol. 69, num. 9, p. 094004-1-094004-14
dc.subject Física
dc.title Generalized parton distributions and composite constituent quarks
dc.type journal article es_ES
dc.date.updated 2015-05-12T10:44:04Z
dc.identifier.doi 10.1103/PhysRevD.69.094004
dc.identifier.idgrec 018691
dc.rights.accessRights open access es_ES

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