# Measurement of the Spin of the $\Omega^-$ Hyperon at BABAR

Abstract : A measurement of the spin of the Omega^- hyperon produced through the exclusive process Xi_c^0 --> Omega^- 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 Xi_c^0 has spin 1/2, the angular distribution of the Lambda from Omega^- --> Lambda K^- decay is inconsistent with all half-integer Omega^- spin values other than 3/2. Lower statistics data for the process Omega_c^0 --> Omega^- pi^+ from a 230 fb^-1 sample are also found to be consistent with Omega^- spin 3/2. If the Xi_c^0 spin were 3/2, an Omega^- spin of 5/2 cannot be excluded.
Document type :
Journal articles

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Submitted on : Wednesday, July 5, 2006 - 3:13:43 PM
Last modification on : Sunday, June 26, 2022 - 11:45:58 AM

### Citation

B. Aubert, R. Barate, M. Bona, D. Boutigny, F. Couderc, et al.. Measurement of the Spin of the $\Omega^-$ Hyperon at BABAR. Physical Review Letters, American Physical Society, 2006, 97, pp.112001. ⟨10.1103/PhysRevLett.97.112001⟩. ⟨in2p3-00084049⟩

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