NAGIOS: RODERIC FUNCIONANDO

Re-analysis of the A(1520) photoproduction reaction

DSpace Repository

Re-analysis of the A(1520) photoproduction reaction

dc.contributor.author	Xie, J. J.
dc.contributor.author	Wang, En
dc.contributor.author	Nieves Pamplona, Juan Miguel
dc.date.accessioned	2014-10-14T12:17:10Z
dc.date.available	2014-10-14T12:17:10Z
dc.date.issued	2014
dc.identifier.uri	http://hdl.handle.net/10550/39180
dc.description.abstract	Based on previous studies that support the important role of the N(2120)D-13 resonance in the gamma p -> K+ A(1520) reaction, we make a re-analysis of this A(1520) photoproduction reaction taking into account the recent CLAS differential cross-section data. In addition to the contact, t-channel (K) over bar exchange, s-channel nucleon pole, and N(2120) [previously called N(2080)] resonance contributions, which have been considered in previous works, we also study the u-channel A(1115) hyperon pole term. The latter mechanism has always been ignored in all theoretical analysis, which has mostly relied on the very forward K+ angular LEPS data. It is shown that when the contributions from the N(2120) resonance and the A(1115) hyperon are taken into account, both the new CLAS and the previous LEPS data can be simultaneously described. We also show that the contribution from the u-channel A(1115) pole term produces an enhancement for large K+ angles, and it becomes more and more relevant as the photon energy increases, being essential to describe the CLAS differential cross sections at backward angles. Furthermore, we find that the new CLAS data also favor the existence of the N*(2120) resonance and that these measurements can be used to further constrain its properties.
dc.language.iso	eng
dc.relation.ispartof	Physical Review C, 2014, vol. 89, num. 1, p. 015203
dc.source	Xie, J. J. Wang, En Nieves Pamplona, Juan Miguel 2014 Re-analysis of the A(1520) photoproduction reaction Physical Review C 89 1 015203
dc.subject	Física
dc.title	Re-analysis of the A(1520) photoproduction reaction
dc.type	journal article	es_ES
dc.date.updated	2014-10-14T12:17:10Z
dc.identifier.doi	http://dx.doi.org/10.1103/PhysRevC.89.015203
dc.identifier.idgrec	099144
dc.rights.accessRights	open access	es_ES