Searches for the lepton flavour violating decay τ−→μ−μ+μ− and the lepton flavour and baryon number violating decays τ−→̄pμ+μ− and τ−→pμ−μ− have been carried out using proton–proton collision data, corresponding to an integrated luminosity of 1. 0fb−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−) <8.0x10−8,B(τ−→̄pμ+μ−)< 3.3×10 -7 and B(τ−→pμ−μ−)<4.4×10−7. The results for the τ−→̄pμ+μ−and τ−→pμ−μ−decay modes represent the first direct experimental limits on these channels.
Searches for violation of lepton flavour and baryon number in tau lepton decays at LHCb
AURIEMMA, Giulio;SATRIANO, Celestina;
2013-01-01
Abstract
Searches for the lepton flavour violating decay τ−→μ−μ+μ− and the lepton flavour and baryon number violating decays τ−→̄pμ+μ− and τ−→pμ−μ− have been carried out using proton–proton collision data, corresponding to an integrated luminosity of 1. 0fb−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−) <8.0x10−8,B(τ−→̄pμ+μ−)< 3.3×10 -7 and B(τ−→pμ−μ−)<4.4×10−7. The results for the τ−→̄pμ+μ−and τ−→pμ−μ−decay modes represent the first direct experimental limits on these channels.File in questo prodotto:
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