Abstract
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.
Original language | English |
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Pages (from-to) | 387-407 |
Number of pages | 21 |
Journal | Physics Letters B |
Volume | B713 |
DOIs | |
Publication status | Published - 2012 |