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dc.contributor.authorGeng, Li Shengen_US
dc.contributor.authorOset, Eulogien_US
dc.contributor.authorDöring, Michaelen_US
dc.identifier.citationEuropean Physical Journal A 32(2): 201-211 (2007)en_US
dc.description11 pages, 9 figures.-- PACS nrs.: 13.40.Hq, 14.20.Jn, 13.75.-n, 25.20.Lj.-- ISI Article Identifier: 000247348200009.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ph/0702093en_US
dc.description.abstractWe evaluate theoretically the radiative decay widths into γΛ and γΣ(0) of the two poles of the Λ(1405) found in chiral unitary theories and we find quite different results for each of the two poles. We show that, depending on which reaction is used to measure the Λ(1405) radiative decays, one gives more weight to one or the other pole, resulting in quite different shapes in the γΛ(Σ(0)) invariant-mass distributions. Our results for the high-energy pole agree with those of the empirical determination of the γΛ and γΣ(0) radiative widths (based on an isobar model fitting of the K(-)p atom data), which are sometimes referred to as "experimental data". We have made a detailed study of the K(-)p -> π(0)γΛ(Σ(0)) and π(-)p -> K-0 γΛ(Σ(0)) reactions and have shown that they, indeed, lead to different shapes for the γΛ(ΣO) invariant-mass distributions.en_US
dc.description.sponsorshipL.S. Geng acknowledges useful communications with Dr. T. Hyodo and financial support from the Ministerio de Educación y Ciencia in the Program of estancias de doctores y tecnólogos extranjeros. This work is partly supported by DGICYT contract number Fis2006-03438 and the Generalitat Valenciana. This research is part of the EU Integrated Infrastructure Initiative Hadron Physics Project under contract number RII3-CT-2004-506078.-
dc.format.extent2373 bytes-
dc.publisherSocietà Italiana di Fisica-
dc.subjectNonperturbative Chiral approachen_US
dc.subjectKaon-nucleon interactionsen_US
dc.subjectQuark modelen_US
dc.subjectElectromagnetic decaysen_US
dc.subject[PACS] Hyperonsen_US
dc.subject[PACS] Hadron-induced low- and intermediate-energy reactions and scattering (energy ≤ 10GeV)en_US
dc.subject[PACS] Photoproduction reactionsen_US
dc.titleThe radiative decay of the Λ(1405) and its two-pole structureen_US
dc.description.peerreviewedPeer revieweden_US
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