A measurement of the spin of the Ω- hyperon produced through the exclusive process Ξc0→Ω-K+ is presented using a total integrated luminosity of 116  fb-1 recorded with the BABAR detector at the e+e- asymmetric-energy B factory at SLAC. Under the assumption that the Ξc0 has spin 1/2, the angular distribution of the Λ from Ω-→ΛK- decay is inconsistent with all half-integer Ω- spin values other than 3/2. Lower statistics data for the process Ωc0→Ω-π+ from a 230  fb-1 sample are also found to be consistent with Ω- spin 3/2. If the Ξc0 spin were 3/2, an Ω- spin of 5/2 could not be excluded.

Measurement of the Spin of the Ω- Hyperon

SIMI, GABRIELE;A. Gaz;MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;
2006

Abstract

A measurement of the spin of the Ω- hyperon produced through the exclusive process Ξc0→Ω-K+ is presented using a total integrated luminosity of 116  fb-1 recorded with the BABAR detector at the e+e- asymmetric-energy B factory at SLAC. Under the assumption that the Ξc0 has spin 1/2, the angular distribution of the Λ from Ω-→ΛK- decay is inconsistent with all half-integer Ω- spin values other than 3/2. Lower statistics data for the process Ωc0→Ω-π+ from a 230  fb-1 sample are also found to be consistent with Ω- spin 3/2. If the Ξc0 spin were 3/2, an Ω- spin of 5/2 could not be excluded.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11577/2517130
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