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phi K+K- production in electron-positron annihilation

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phi K+K- production in electron-positron annihilation

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dc.contributor.author Gómez Avila, Selim
dc.contributor.author Napsuciale, Mauro
dc.contributor.author Oset Báguena, Eulogio
dc.date.accessioned 2015-09-07T10:21:36Z
dc.date.available 2015-09-07T10:21:36Z
dc.date.issued 2009
dc.identifier.citation Gómez Avila, Selim Napsuciale, Mauro Oset Báguena, Eulogio 2009 phi K+K- production in electron-positron annihilation Physical Review D 79 3 034018
dc.identifier.uri http://hdl.handle.net/10550/46871
dc.description.abstract In this work we study the e^{+}e^{-}\to\phi K^{+}K^{-} reaction. The leading order electromagnetic contributions to this process involve the \gamma*\phi\ K^{+}K^{-} vertex function with a highly virtual photon. We calculate this function at low energies using R\chi PT supplemented with the anomalous term for the VV'P interactions. Tree level contributions involve the kaon form factors and the K*K transition form factors. We improve this result, valid for low photon virtualities, replacing the lowest order terms in the kaon form factors and K*K transition form factors by the form factors as obtained in U\chi PT in the former case and the ones extracted from recent data on e^{+}e^{-}\to KK* in the latter case. We calculate rescattering effects which involve meson-meson amplitudes. The corresponding result is improved using the unitarized meson-meson amplitudes containing the scalar poles instead of the lowest order terms. Using the BABAR value for BR(X\to \phi f_{0})\Gamma (X\to e^{+} e^{-}), we calculate the contribution from intermediate X(2175). A good description of data is obtained in the case of destructive interference between this contribution and the previous ones, but more accurate data on the isovector K*K transition form factor is required in order to exclude contributions from an intermediate isovector resonance to e^{+}e^{-}\to \phi\ K^{+}K^{-} around 2.2 GeV.
dc.language.iso eng
dc.relation.ispartof Physical Review D, 2009, vol. 79, num. 3, p. 034018
dc.subject Física
dc.title phi K+K- production in electron-positron annihilation
dc.type journal article es_ES
dc.date.updated 2015-09-07T10:21:36Z
dc.identifier.doi 10.1103/PhysRevD.79.034018
dc.identifier.idgrec 056205
dc.rights.accessRights open access es_ES

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