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Título:	Search for the Decays Bs0→τ+τ- and B0→τ+τ-
Autor/a:	Badalov, Alexey; Calvo Gómez, Míriam; Camboni, Alessandro; Coquereau, Samuel; Fernandez, G.; Garrido Beltrán, Lluís; Gascón Fora, David; Graciani Díaz, Ricardo; Graugés Pous, Eugeni; Marin Benito, Carla; Picatoste Olloqui, Eduardo; Rives Molina, Vicente José; Sánchez Gonzalo, David; Vilasis-Cardona, Xavier; LHCb Collaboration
Otros autores:	Universitat de Barcelona
Abstract:	A search for the rare decays Bs0→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 3 fb-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 (Bs0→τ+τ- )<6.8 ×10-3 at the 95% confidence level. If instead no contribution from Bs0→τ+τ- decays is assumed, the limit is B (B0→τ+τ- )<2.1 ×10-3 at the 95% confidence level. These results correspond to the first direct limit on B (Bs0→τ+τ- ) and the world's best limit on B (B0→τ+τ- ).
Materia(s):	-Física de partícules -Experiments -Particle physics -Experiments
Derechos:	cc by (c) CERN; LHCb Collaboration, 2017 http://creativecommons.org/licenses/by/3.0/es/
Tipo de documento:	Artículo Artículo - Versión publicada
Editor:	American Physical Society
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