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

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

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LHCb Collaboration; Oyanguren Campos, Arantza Perfil; Ruiz Valls, Pablo
Aquest document és un/a article, creat/da en: 2013

Este documento está disponible también en : http://dx.doi.org/10.1016/j.physletb.2013.05.063
Searches for the lepton flavour violating decay tau(-) -> mu(-)mu(+)mu(-) and the lepton flavour and baryon number violating decays tau(-) -> (p) over bar mu(+)mu(-) and tau(-) -> p mu(-)mu(-) 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 root 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(tau(-) -> mu(-)mu(+)mu(-) < 8.0 x 10(-8), B(tau(-) -> <(p)over bar>mu(+)mu(-)) < 3.3 x 10(-7) and B(tau(-) -> p mu(-)mu(-)) < 4.4 x 10(-7). The results for the tau(-) -> (p) over bar mu(+)mu(-) and tau(-) -> p mu(-)mu(-) decay modes represent the first direct experimental limits on these channels.

    LHCb Collaboration Oyanguren Campos, Arantza Ruiz Valls, Pablo 2013 Searches for violation of lepton flavour and baryon number in tau lepton decays at LHCb Physics Letters B 724 1-3 36 45
http://dx.doi.org/10.1016/j.physletb.2013.05.063
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