Search for the Standard Model Higgs boson decay to ${\mu }^{+}{\mu }^{-}$ with the ATLAS detector

Abstract

A search is reported for Higgs boson decay to ${\mu }^{+}{\mu }^{-}$ using data with an integrated luminosity of $24.8{\mathrm{fb}}^{-1}$ collected with the ATLAS detector in $pp$ collisions at $\sqrt{s}$=7 and 8 TeV at the CERN Large Hadron Collider. The observed dimuon invariant mass distribution is consistent with the Standard Model background-only hypothesis in the 120-150 GeV search range. For a Higgs boson with a mass of 125.5 GeV, the observed (expected) upper limit at the 95 % confidence level is 7.0 (7.2) times the Standard Model expectation. This corresponds to an upper limit on the branching ratio BR($H\to {\mu }^{+}{\mu }^{-}$) of $1.5\times 10^{-3}$.

arXiv comment9 pages plus author list + cover pages (23 pages total), 4 figures, 3 tables, submitted to Physics Letters B, All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2013-07/

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