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Transition form factors of the N(*()1535) as a dynamically generated resonance

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Transition form factors of the N(*()1535) as a dynamically generated resonance

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dc.contributor.author Jido, D.
dc.contributor.author Döring, Michael
dc.contributor.author Oset Báguena, Eulogio
dc.date.accessioned 2015-09-07T12:01:23Z
dc.date.available 2015-09-07T12:01:23Z
dc.date.issued 2008
dc.identifier.citation Jido, D. Döring, Michael Oset Báguena, Eulogio 2008 Transition form factors of the N(*()1535) as a dynamically generated resonance Physical Review C 77 6 065207
dc.identifier.uri http://hdl.handle.net/10550/46903
dc.description.abstract We discuss how electromagnetic properties provide useful tests of the nature of resonances, and we study these properties for the N*(1535) which appears dynamically generated from the strong interaction of mesons and baryons. Within this coupled channel chiral unitary approach, we evaluate the A_1/2 and S_1/2 helicity amplitudes as a function of Q^2 for the electromagnetic N*(1535) to gamma* N transition. Within the same formalism we evaluate the cross section for the reactions gamma N to eta N. We find a fair agreement for the absolute values of the transition amplitudes, as well as for the Q^2 dependence of the amplitudes, within theoretical and experimental uncertainties discussed in the paper. The ratios obtained between the S_1/2 and A_1/2 for the neutron or proton states of the N*(1535) are in qualitative agreement with experiment and there is agreement on the signs. The same occurs for the ratio of cross sections for the eta photoproduction on neutron and proton targets in the vicinity of the N*(1535) energy. The global results support the idea of this resonance as being dynamically generated, hence, largely built up from meson baryon components. However, the details of the model indicate that an admixture with a genuine quark state is also demanded that could help obtain a better agreement with experimental data.
dc.language.iso eng
dc.relation.ispartof Physical Review C, 2008, vol. 77, num. 6, p. 065207
dc.subject Física
dc.title Transition form factors of the N(*()1535) as a dynamically generated resonance
dc.type journal article es_ES
dc.date.updated 2015-09-07T12:01:23Z
dc.identifier.doi 10.1103/PhysRevC.77.065207
dc.identifier.idgrec 010065
dc.rights.accessRights open access es_ES

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