Searches for violation of lepton flavour and baryon number in tau lepton decays at LHCb

Searches for the lepton flavour violating decay τ−→μ−μ+μ− and the lepton flavour and baryon number violating decays τ−→p¯μ+μ− and τ−→pμ−μ− have been carried out using proton–proton collision data, corresponding to an integrated luminosity of 1.0 fb−1, taken by the LHCb experiment at s=7 TeV. No evid...

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Published inPhysics letters. B Vol. 724; no. 1-3; pp. 36 - 45
Main Authors Anderlini, L., Bauer, Th, Bay, A., Beddow, J., Bedeschi, F., Belyaev, I., Benson, S., van Beuzekom, M., Bird, T., Bozzi, C., Bursche, A., Carson, L., Cid Vidal, X., Coca, C., Craik, D.C., David, P., De Capua, S., De Cian, M., Deckenhoff, M., Del Buono, L., Dziurda, A., Fave, V., Francisco, O., Frosini, M., Gandelman, M., Garrido, L., Göbel, C., Golubkov, D., Gomes, A., Gushchin, E., Haefeli, G., Hall, S., He, J., van Herwijnen, E., Huse, T., Ilten, P., Jaeger, A., John, M., Johnson, D., Karacson, M., Keune, A., Komarov, I., Koopman, R.F., Lanciotti, E., Lefèvre, R., Lesiak, T., Liu, G., Longstaff, I., Lopez-March, N., Machikhiliyan, I.V., Maev, O., Martin, L., Massafferri, A., Matev, R., Meissner, M., Mountain, R., Muster, B., Nakada, T., Nandakumar, R., Niess, V., Nikodem, T., Papanestis, A., Pappagallo, M., Parkes, C., Passaleva, G., Patel, G.D., Perego, D.L., Perez Trigo, E., Perrin-Terrin, M., Playfer, S., Puig Navarro, A., Punzi, G., Qian, W., Rives Molina, V., Robbe, P., Romero Vidal, A., Saitta, B., Salzmann, C., Santamarina Rios, C., Sapunov, M., Satriano, C., Schiller, M., Sciascia, B., Serra, N., Shires, A., Skwarnicki, T., Souza, D., Stagni, F., Storaci, B., Swientek, S., Tourneur, S., Veneziano, G., Vesterinen, M., Volyanskyy, D., Voong, D., Watson, N.K., Wiechczynski, J., Wishahi, J., Witek, M., Wotton, S.A.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 09.07.2013
Elsevier
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Summary:Searches for the lepton flavour violating decay τ−→μ−μ+μ− and the lepton flavour and baryon number violating decays τ−→p¯μ+μ− and τ−→pμ−μ− have been carried out using proton–proton collision data, corresponding to an integrated luminosity of 1.0 fb−1, taken by the LHCb experiment at s=7 TeV. No evidence has been found for any signal, and limits have been set at 90% confidence level on the branching fractions: B(τ−→μ−μ+μ−)<8.0×10−8, B(τ−→p¯μ+μ−)<3.3×10−7 and B(τ−→pμ−μ−)<4.4×10−7. The results for the τ−→p¯μ+μ− and τ−→pμ−μ− decay modes represent the first direct experimental limits on these channels.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2013.05.063