Strong constraints on the rare decays Bs -&gt; mu+ mu- and B0 -&gt; mu+ mu-
Creators: name: LHCb Collaboration
name: Aaij, R.
name: Beteta, C. Abellan
name: Adametz, A.
name: Adeva, B.
name: Adinolfi, M.
name: Adrover, C.
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name: Gutierrez, O. Aquines
name: Archilli, F.
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name: Artuso, M.
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name: Auriemma, G.
name: Bachmann, S.
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name: Bjørnstad, P. M.
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name: Brand, J. van den
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name: Brett, D.
name: Britsch, M.
name: Britton, T.
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Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: A search for Bs -&gt; mu+ mu- and B0 -&gt; mu+ mu- decays is performed using 1.0 fb^-1 of pp collision data collected at \sqrt{s}=7 TeV with the LHCb experiment at the Large Hadron Collider. For both decays the number of observed events is consistent with expectation from background and Standard Model signal predictions. Upper limits on the branching fractions are determined to be BR(Bs -&gt; mu+ mu-) &lt; 4.5 (3.8) x 10^-9 and BR(B0 -&gt; mu+ mu-) &lt; 1.0 (0.81) x 10^-9 at 95% (90%) confidence level.
description: 2+6 pages; 4 figures; Accepted for publication in Physical Review Letters