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Theoretical study of the gamma gamma -> meson-meson reaction

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Theoretical study of the gamma gamma -> meson-meson reaction

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dc.contributor.author Oller Berber, José Antonio
dc.contributor.author Oset Báguena, Eulogio
dc.date.accessioned 2015-09-04T10:13:00Z
dc.date.available 2015-09-04T10:13:00Z
dc.date.issued 1998
dc.identifier.citation Oller Berber, José Antonio Oset Báguena, Eulogio 1998 Theoretical study of the gamma gamma -> meson-meson reaction Nuclear Physics A 629 3-4 739 760
dc.identifier.uri http://hdl.handle.net/10550/46849
dc.description.abstract We present a unified picture which studies simultaneously the gamma gamma-->pi^+ pi^-, pi^0 pi^0, K^+ K^-, K^0 bar{K}^0, pi^0 eta reactions up to about sqrt(s)=1.4 GeV reproducing the experimental cross sections. The present work implements in an accurate way the final state interactions of the meson-meson system, which is shown to be essential in order to reproduce the data, particularly the L=0 channel. This latter channel is treated here following a recent theoretical work in which the meson-meson amplitudes are well reproduced and the f_0, a_0, sigma resonances show up clearly as poles of the t matrix. The present work, as done in earlier ones, also incorporates elements of chiral symmetry and exchange of vector and axial resonances in the crossed channels, as well as a direct coupling to the f_2(1270) and a_2(1320) resonances. We also evaluate the decay width of the f_0(980) and a_0(980) resonances into the gamma-gamma channel.
dc.language.iso eng
dc.relation.ispartof Nuclear Physics A, 1998, vol. 629, num. 3-4, p. 739-760
dc.subject Física
dc.title Theoretical study of the gamma gamma -> meson-meson reaction
dc.type journal article es_ES
dc.date.updated 2015-09-04T10:13:00Z
dc.identifier.doi 10.1016/S0375-9474(97)00649-0
dc.identifier.idgrec 079435
dc.rights.accessRights open access es_ES

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