Search for the decays B0s→τ+τ− and B0→τ+τ−

Abstract : A search for the rare decays B0s→τ+τ− and B0→τ+τ− is performed using proton--proton collision data collected with the LHCb detector. The data sample corresponds to an integrated luminosity of 3fb−1 collected in 2011 and 2012. The τ leptons are reconstructed through the decay τ−→π−π+π−ντ. Assuming no contribution from B0→τ+τ− decays, an upper limit is set on the branching fraction B(B0s→τ+τ−)<6.8×10−3 at 95\% confidence level. If instead no contribution from B0s→τ+τ− decays is assumed, the limit is B(B0→τ+τ−)<2.1×10−3 at 95\% confidence level. These results correspond to the first direct limit on B(B0s→τ+τ−) and the world's best limit on B(B0→τ+τ−).
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Physical Review Letters, American Physical Society, 2017, 118, pp.251802. 〈https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.118.251802〉. 〈10.1103/PhysRevLett.118.251802〉
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http://hal.in2p3.fr/in2p3-01485630
Contributeur : Claudine Bombar <>
Soumis le : jeudi 9 mars 2017 - 10:54:02
Dernière modification le : jeudi 18 janvier 2018 - 01:51:25

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R. Aaij, L. Beaucourt, M. Chefdeville, D. Decamp, N. Déléage, et al.. Search for the decays B0s→τ+τ− and B0→τ+τ−. Physical Review Letters, American Physical Society, 2017, 118, pp.251802. 〈https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.118.251802〉. 〈10.1103/PhysRevLett.118.251802〉. 〈in2p3-01485630〉

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