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

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

2004-02-14

arxiv.org/abs/hep-ex/0402026v2

Phys.Lett.B590:161-169,2004

Physics

High Energy Physics

High Energy Physics - Experiment

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

Scientific paper

10.1016/j.physletb.2004.04.006

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.

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