/ hep-ex CERN-PH-EP-2014-006

Search for Higgs boson decays to a photon and a Z boson in pp collisions at $\sqrt{s}$=7 and 8 TeV with the ATLAS detector

Pages: 20

Abstract: A search is reported for a neutral Higgs boson in the decay channel $H → Z\gamma, Z → l^+ l^- (l = e,µ)$, using 4.5 fb$^{-1}$ of pp collisions at $\sqrt{s}$ = 7 TeV and 20.3 fb$^{-1}$ of pp collisions at $\sqrt{s}$ = 8 TeV, recorded by the ATLAS detector at the CERN Large Hadron Collider. The observed distribution of the invariant mass of the three final-state particles, $m_{ll\gamma}$, is consistent with the Standard Model hypothesis in the investigated mass range of 120–150 GeV. For a Higgs boson with a mass of 125.5 GeV, the observed upper limit at the 95% confidence level is 11 times the Standard Model expectation. Upper limits are set on the cross section times branching ratio of a neutral Higgs boson with mass in the range 120–150 GeV between 0.13 and 0.5 pb for $\sqrt{s}$ = 8 TeV at 95% confidence level.

Note: 9 pages plus author list (20 pages total), 3 figures, 2 tables, submitted to Physics Letters B. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2013-05/

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Запись создана 2014-03-04, последняя модификация 2014-03-04

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