"A blind analysis searching for the decay B-s(0) -> mu(+)mu(-) 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(B-s(0) -> mu(+)mu(-)) <2.2(1.9) x 10(-8) at 95% (90%) confidence level. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved."
Aad, G., Abbott, B., Abdallah, J., Khalek, S.a., Abdelalim, A.a., Abdinov, O., et al. (2012). Search for the decay B-s(0) -> mu(+)mu(-) with the ATLAS detector. PHYSICS LETTERS. SECTION B, 713(4-5), 387-407 [10.1016/j.physletb.2012.06.013].