Upper limit on the decay Sigma(1385)- --> Sigma- gamma, and cross section for gamma Sigma- --> Lambda pi-

Abstract

Coherent Lambda pi- production on Pb of 600 GeV Sigma- hyperons has been studied with the SELEX facility at Fermilab. Using the Primakoff formalism, we set a 90% CL upper limit on the radiative decay width Gamma [Sigma(1385)- --> Sigma- gamma] < 9.5 keV, and estimate the cross section for gamma Sigma- --> Lambda pi- at sqrt(s) = 1.385 GeV to be 56+/-16 mkb.

arXiv comment13 pages, 3 figures, LaTeX, few clarifications, accepted by Phys.Lett.B

References in corpus (10)

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• Baryon Octet to Decuplet Electromagnetic Transitions
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• Properties of Light Flavour Baryons in Hypercentral quark model
• K*Sigma photoproduction off the proton target with baryon resonances
• A covariant model for the decuplet to octet Dalitz decays
• Measurement of the radiative decay width Γ[Λ(1520) --> Λγ] with the SPHINX spectrometer
• Electromagnetic transitions among octet and decuplet baryons in QCD
• Meson cloud contributions to the Dalitz decays of decuplet to octet baryons
• Study of Electromagnetic Properties of Light Baryons in the Hypercentral Approach