Search for the decays $B_s^0\to\tau^+\tau^-$ and $B^0\to\tau^+\tau^-$

Bernardo Adeva, Marco Adinolfi, Ziad Ajaltouni, Simon Akar, Johannes Albrecht, Federico Alessio, Michael Alexander, Suvayu Ali, Georgy Alkhazov, Paula Alvarez Cartelle, Antonio Au Alves Jr, Sandra Amato, Silvia Amerio, Yasmine Amhis, Liupan An, Lucio Anderlini, Guido Andreassi, Mirco Andreotti, Jason Andrews, Robert ApplebyFlavio Archilli, Philippe d'Argent, Joan Arnau Romeu, Alexander Artamonov, Marina Artuso, Elie Aslanides, Giulio Auriemma, Marouen Baalouch, Igor Babuschkin, Sebastian Bachmann, John Back, Alexey Badalov, Clarissa Baesso, Sophie Baker, Vladislav Balagura, Wander Baldini, Alexander Baranov, Roger Barlow, Colin Barschel, Sergey Barsuk, William Barter, Fedor Baryshnikov, Mateusz Baszczyk, Varvara Batozskaya, Baasansure Batsukh, Vincenzo Battista, Aurelio Bay, Leo Beaucourt, John Beddow, Franco Bedeschi, Ignacio Bediaga, Andrew Beiter, Lennaert Bel, Violaine Bellee, Nicoletta Belloli, Konstantin Belous, Ivan Belyaev, Eli Ben-Haim, Giovanni Bencivenni, Sean Benson, Sarah 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Castillo Garcia, Marco Cattaneo, Giovanni Cavallero, Riccardo Cenci, David Chamont, Matthew Charles, Philippe Charpentier, Georgios Chatzikonstantinidis, Maximilien Chefdeville, Shanzhen Chen, Shu-Faye Cheung, Veronika Chobanova, Marcin Chrzaszcz, Alexsei Chubykin, Xabier Cid Vidal, Gregory Ciezarek, Peter Clarke, Marco Clemencic, Harry Cliff, Joel Closier, Victor Coco, Julien Cogan, Eric Cogneras, Violetta Cogoni, Lucian Cojocariu, Paula Collins, Albert Comerma-Montells, Andrea Contu, Andrew Cook, George Coombs, Samuel Coquereau, Gloria Corti, Marco Corvo, Cayo Mar Costa Sobral, Benjamin Couturier, Greig Cowan, Daniel Cha Craik, Andrew Crocombe, Melissa Ma Cruz Torres, Samuel Cunliffe, Robert Currie, Carmelo D'Ambrosio, Franciole Da Cunha Marinho, Elena Dall'Occo, Jeremy Dalseno, Pieter David, Adam Davis, Kristof De Bruyn, Stefano De Capua, Michel De Cian, Jussara De Miranda, Leandro De Paula, Marilisa De Serio, Patrizia De Simone, Cameron Th Dean, Daniel Decamp, Mirko Deckenhoff, Luigi Del Buono, Hans Peter Dembinski, Moritz Demmer, Adam Dendek, Denis Derkach, Olivier Deschamps, Francesco Dettori, Biplab Dey, Angelo Di Canto, Pasquale Di Nezza, Hans Dijkstra, Francesca Dordei, Mirco Dorigo, Alvaro Dosil Suárez, Anatoliy Dovbnya, Karlis Dreimanis, Laurent Dufour, Giulio Dujany, Kevin Dungs, Paolo Durante, Rustem Dzhelyadin, Michal Dziewiecki, Agnieszka Dziurda, Alexey Dzyuba, Nicolas Déléage, Sajan Easo, Marcus Ebert, Ulrik Egede, Victor Egorychev, Semen Eidelman, Stephan Eisenhardt, Ulrich Eitschberger, Robert Ekelhof, Lars Eklund, Scott Ely, Sevda Esen, Hannah Mar Evans, Timothy Evans, Antonio Falabella, Nathanael Farley, Stephen Farry, Robert Fay, Davide Fazzini, Dianne Ferguson, Gerard Fernandez, Antonio Fernandez Prieto, Fabio Ferrari, Fernando Ferreira Rodrigues, Massimilia Ferro-Luzzi, Sergey Filippov, Rosa Anna Fini, Marco Fiore, Massimilia Fiorini, Miroslaw Firlej, Conor Fitzpatrick, Tomasz Fiutowski, Frederic Fleuret, Klaus Fohl, Marianna Fontana, Flavio Fontanelli, Dean Charl Forshaw, Roger Forty, Vinicius Franco Lima, Markus Frank, Christoph Frei, Jinlin Fu, Wolfgang Funk, Emiliano Furfaro, Christian Färber, Abraham Gallas Torreira, Domenico Galli, Stefano Gallorini, Silvia Gambetta, Miriam Gandelman, Paolo Gandini, Yuanning Gao, Luis Migue Garcia Martin, Julián García Pardiñas, Jordi Garra Tico, Lluis Garrido, Philip Joh Garsed, David Gascon, Clara Gaspar, Laura Gavardi, Giulio Gazzoni, David Gerick, Evelina Gersabeck, Marco Gersabeck, Timothy Gershon, Philippe Ghez, Sebastiana Gianì, Valerie Gibson, Olivier G Girard, Lavinia-He Giubega, Konstantin Gizdov, Vladimir Gligorov, Dmitry Golubkov, Andrey Golutvin, Alvaro Gomes, Igor Vladi Gorelov, Claudio Gotti, Ekaterina Govorkova, Ricardo Graciani Diaz, Luis Alber Granado Cardoso, Eugeni Graugés, Elena Graverini, Giacomo Graziani, Alexandru Grecu, Roman Greim, Peter Griffith, Lucia Grillo, Barak Raim Gruberg Cazon, Oliver Grünberg, Evgeny Gushchin, Yury Guz, Thierry Gys, Carla 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Research output: Contribution to journalArticlepeer-review

Abstract

A search for the rare decays $B_s^0\to\tau^+\tau^-$ and $B^0\to\tau^+\tau^-$ 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 $\tau$ leptons are reconstructed through the decay $\tau^-\to\pi^-\pi^+\pi^-\nu_{\tau}$. Assuming no contribution from $B^0\to\tau^+\tau^-$ decays, an upper limit is set on the branching fraction $\mathcal{B}(B_s^0\to\tau^+\tau^-) <6.8\times 10^{-3}$ at 95\% confidence level. If instead no contribution from $B_s^0\to\tau^+\tau^-$ decays is assumed, the limit is $\mathcal{B}(B^0\to\tau^+\tau^-)<2.1 \times 10^{-3}$ at 95\% confidence level. These results correspond to the first direct limit on $\mathcal{B}(B_s^0\to\tau^+\tau^-)$ and the world's best limit on $\mathcal{B}(B^0\to\tau^+\tau^-)$.
Original languageEnglish
Article numberAaij:2017xqt
Pages (from-to)251802
JournalPhysical Review Letters
Volume118
Issue number25
DOIs
Publication statusPublished - 21 Jun 2017

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