The Contribution of Bc Mesons to the Search for B->tau nu Decays at LEP

Abstract

We study the contribution of B_c mesons to the search for B->tau nu decays. We find that at LEP the contributions from B_u and B_c 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 B_c contribution can reduce the current L3 limit on Tan(beta)/M_H from 0.38/GeV (90%CL) down to 0.27/GeV (90%CL).

8 pages, Latex, epsfig, 1 figure

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• Mesons with Beauty and Charm: Spectroscopy
• $B_c$ spectroscopy
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• Physics of B_c mesons
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Cited by in corpus (10)

• Constraint on the branching ratio of B_c \to tau nu from LEP1 and consequences for R(D(*)) anomaly
• Direct Search for Charged Higgs Bosons in Decays of Top Quarks
• Analysis of $B_c\to \tau {\nu }_{\tau }$ at CEPC
• Constraints on the R-parity Violating Couplings from $B^{\pm }\to l^{\pm }\nu$ Decays
• Prospects for $B_c^{+}$ and $B^{+}\to {\tau }^{+}{\nu }_{\tau }$ at FCC-ee
• The first limit on invisible decays of $B_s$ mesons comes from LEP
• R Parity violating enhancement of Bu -> l nu and Bc -> l nu
• Measuring B -> tau nu and B_c -> tau nu at the Z peak
• Study of s-channel Charged Higgs Production in CMS
• Prospects for $B_c^{+}\to {\tau }^{+}{\nu }_{\tau }$ at FCC-ee