Search for the decay $B_s^0 \to \mu \mu$ with the ATLAS detector

• Main Author: ATLAS collaboration (2869 authors)
• Publication Date: 2013
• Other Authors: Aguilar-Saavedra, Juan Antonio, Anjos, Nuno, Carvalho, João, Castro, Nuno Filipe, Conde Muiño, Patricia, Do Valle Wemans, André, Fiolhais, Miguel, Gomes, Agostinho, Gonçalo, Ricardo, Jorge, Pedro, Lopes, Lourenco, Machado Miguens, Joana, Maio, Amélia, Maneira, José, Oliveira, Miguel Alfonso, Onofre, António, Palma, Alberto, Pina, João Antonio, Pinto, Belmiro, Santos, Helena, Saraiva, João, Silva, José, Veloso, Filipe, Wolters, Helmut
• Format: Article
• Language: eng
• Source: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
• Download full: http://dx.doi.org/10.1016/j.physletb.2012.06.013; http://hdl.handle.net/10400.26/26144

A blind analysis searching for the decay Bs0 -> mumu has been performed using proton-proton collisions at a centre-of-mass energy of 7 TeV recorded with the ATLAS detector at the LHC. With an integrated luminosity of 2.4 fb^(-1) no excess of events over the background expectation is found and an upper limit is set on the branching fraction BR(Bs0 -> mu mu) < 2.2 (1.9) x10^(-8) at 95% (90%) confidence level.