A search for the rare decays Bs0âÏ+Ï- and B0âÏ+Ï- 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 Ï leptons are reconstructed through the decay Ï-âÏ-Ï+Ï-νÏ. Assuming no contribution from B0âÏ+Ï- decays, an upper limit is set on the branching fraction B(Bs0âÏ+Ï-)<6.8Ã10-3 at the 95% confidence level. If instead no contribution from Bs0âÏ+Ï- decays is assumed, the limit is B(B0âÏ+Ï-)<2.1Ã10-3 at the 95% confidence level. These results correspond to the first direct limit on B(Bs0âÏ+Ï-) and the world's best limit on B(B0âÏ+Ï-).
Search for the Decays Bs0 -> tau+ tau- and B0 -> tau+ tau-
De Serio, M.;Pappagallo, M.;Simone, S.;
2017-01-01
Abstract
A search for the rare decays Bs0âÏ+Ï- and B0âÏ+Ï- 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 Ï leptons are reconstructed through the decay Ï-âÏ-Ï+Ï-νÏ. Assuming no contribution from B0âÏ+Ï- decays, an upper limit is set on the branching fraction B(Bs0âÏ+Ï-)<6.8Ã10-3 at the 95% confidence level. If instead no contribution from Bs0âÏ+Ï- decays is assumed, the limit is B(B0âÏ+Ï-)<2.1Ã10-3 at the 95% confidence level. These results correspond to the first direct limit on B(Bs0âÏ+Ï-) and the world's best limit on B(B0âÏ+Ï-).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.


