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Observation of the decay Omega(0)(c)-->Omega(-)e(+)nu(e) |
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| 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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