Search for the decay B→D_(s1)^+ (2536)X

Creators: Bishai, M.; Barish, B.; Chadha, M.; Chan, S.; Eigen, G.; Miller, J. S.; O'Grady, C.; Schmidtler, M.; Urheim, J.; Würthwein, F.; Weinstein, Alan J.; CLEO Collaboration

Abstract

We have searched for the decay B⃗D_(s1)^+(2536)X and measured an upper limit for the inclusive branching fraction of B(B⃗D_(s1)^+X)<0.96% at the 90% confidence level. This limit is small compared with the total expected B⃗D^((*))D^((*))KX rate. Assuming factorization, the D_(s1)^+ decay constant is constrained to be fD_(s1)^+<114 MeV at the 90% confidence level, at least 2.5 times smaller than that of D_s^+.

Additional Information

© 1998 The American Physical Society. Received 23 October 1997; published 10 March 1998. We gratefully acknowledge the effort of the CESR staff in providing us with excellent luminosity and running conditions. J.P.A., J.R.P., and I.P.J.S. thank the NYI program of the NSF, M.S. thanks the PFF program of the NSF, G.E. thanks the Heisenberg Foundation, K.K.G., M.S., H.N.N., T.S., and H.Y. thank the OJI program of DOE, J.R.P., K.H., M.S. and V.S. thank the A.P. Sloan Foundation, R.W. thanks the Alexander von Humboldt Stiftung, M.S. thanks Research Corporation, and S.D. thanks the Swiss National Science Foundation for support. This work was supported by the National Science Foundation, the U.S. Department of Energy, and the Natural Sciences and Engineering Research Council of Canada.

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