Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France.
A measurement of the spin of the Omega(-) hyperon produced through the exclusive process Xi(0)(c)->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(0)(c) 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(0)(c)->Omega(-)pi(+) from a 230 fb(-1) sample are also found to be consistent with Omega(-) spin 3/2. If the Xi(0)(c) spin were 3/2, an Omega(-) spin of 5/2 could not be excluded.