Searches for the baryon- and lepton-number violating decays $B^0\rightarrow\Lambda_c^+\ell^-$, $B^-\rightarrow\Lambda\ell^-$, and $B^-\rightarrow\bar{\Lambda}\ell^-$
- Del Amo Sanchez, P.
- P. Lees, J.
- Poireau, V.
- Prencipe, E.
- Tisserand, V.
- Bernard, D.
- Verderi, M.
- Arnaud, N.
- Davier, M.
- Derkach, D.
- Firmino Da Costa, J.
- Grosdidier, G.
- Le Diberder, F.
- M. Lutz, A.
- Malaescu, B.
- Perez, A.
- Roudeau, P.
- H. Schune, M.
- Serrano, J.
- Sordini, V.
- Stocchi, A.
- Wang, L.
- Wormser, G.
- Ben-Haim, E.
- Bomben, M.
- R. Bonneaud, G.
- Briand, H.
- Calderini, G.
- Chauveau, J.
- Hamon, O.
- Leruste, Ph.
- Marchiori, G.
- Ocariz, J.
- Prendki, J.
- Sitt, S.
- Emery, S.
- Hamel De Monchenault, G.
- Vasseur, G.
- Yèche, Ch.
DOIAbstract
See paper for full list of authors - 10 pages, 14 EPS figures, submitted to PRD-RCSearches for $B$ mesons decaying to final states containing a baryon and a lepton are performed, where the baryon is either $\Lambda_c$ or $\Lambda$ and the lepton is a muon or an electron. These decays violate both baryon and lepton number and would be a signature of physics beyond the standard model. No significant signal is observed in any of the decay modes, and upper limits in the range $(3.2-520) \times 10^{-8}$ are set on the branching fractions at the 90% confidence level
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