Radiative decays of the Sigma0(1385) and Lambda(1520) hyperons

Abstract

The electromagnetic decays of the Sig0(1385) and Lambda(1520) hyperons were studied in photon-induced reactions gamma p -> K+ Lambda(1116)gamma in the CLAS detector at the Thomas Jefferson National Accelerator Facility. We report the first observation of the radiative decay of the Sig0(1385) and a measurement of the Lambda(1520) radiative decay width. For the Sig0(1385) -> Lambda(1116)gamma transition, we measured a partial width of 479+/-120(stat)+81-100(sys) keV, larger than all of the existing model predictions. For the Lambda(1520) -> Lambda(1116)gamma transition, we obtained a partial width of 167+/-43(stat)+26-12(sys) keV.

15 pages, 19 eps figures, revtex4, accepted for publication Phys. Rev. C. Additional reference added with discusion in introduction and results sectons. Figure 17 has been corrected

References in corpus (3)

• Electroproduction of the $\Lambda (1520)$ hyperon
• Hyperon Radiative Decays in the 1/N_c Expansion
• Measurement of the radiative decay width Γ[Λ(1520) --> Λγ] with the SPHINX spectrometer

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