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Observation of the decay Omega(0)(c)-->Omega(-)e(+)nu(e)
Authors:Ammar R  Besson D  Zhao X  Anderson S  Frolov V V  Kubota Y  Lee S J  Li S Z  Poling R  Smith A  Stepaniak C J  Urheim J  Ahmed S  Alam M S  Jian L  Saleem M  Wappler F  Eckhart E  Gan K K  Gwon C  Hart T  Honscheid K  Hufnagel D  Kagan H  Kass R  Pedlar T K  Thayer J B  von Toerne E  Wilksen T  Zoeller M M  Muramatsu H  Richichi S J  Severini H  Skubic P  Dytman S A  Nam S  Savinov V  Chen S  Hinson J W  Lee J  Miller D H  Pavlunin V  Shibata E I  Shipsey I P J  Cronin-Hennessy D  Lyon A L  Park C S  Park W  Thorndike E H  Coan T E  Gao Y S  Liu F  Maravin Y  Narsky I  Stroynowski R  Artuso M  Boulahouache C  Bukin K  Dambasuren E  Mountain R
Affiliation:University of Kansas, Lawrence, Kansas 66045, USA.
Abstract:Using the CLEO detector at the Cornell Electron Storage Ring we have observed the Omega(0)(c) (css ground state) in the decay Omega(0)(c)-->Omega(-)e(+)nu(e). We find a signal of 11.4+/-3.8(stat) events. The probability that we have observed a background fluctuation is 7.6x10(-5). We measure B(Omega(0)(c)-->Omega(-)e(+)nu(e)).sigma(e(+)e(-)-->Omega(0)(c)X)=(42.2+/-14.1(stat)+/-5.7(syst)) fb and R=[Gamma(Omega(0)(c)-->Omega(-)pi(+))]/[Gamma(Omega(0)(c)-->Omega(-)enu(e))]=00.41+/-0.19(stat)+/-0.04(syst). This is the first statistically significant observation of an individual decay mode of the Omega(0)(c) in e(+)e(-) annihilation and the first example of a baryon decaying via beta emission, where no quarks from the first generation participate in the reaction.
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