The Contribution of Bc Mesons to the Search for B->tau nu Decays at LEP
M. L. Mangano, S. R. Slabospitsky
Abstract
We study the contribution of Bc mesons to the search for B->tau nu decays. We find that at LEP the contributions from Bu and Bc mesons can be comparable. This observation can have a relevant impact on the extraction of constraints on new physics (such as charged-Higgs contributions) from current LEP limits on B->tau nu final states. Inclusion of the Bc contribution can reduce the current L3 limit on Tan(beta)/MH from 0.38/GeV (90%CL) down to 0.27/GeV (90%CL).
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