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Search for displaced muonic lepton jets from light Higgs boson decay in proton-proton collisions at root s=7 TeV with the ATLAS detector

Aad, G. ; Abajyan, T. ; Abbott, B. ; Abdallah, J. ; Khalek, S. Abdel ; Abdelalim, A. A. ; Abdinov, O. ; Aben, R. ; Abi, B. and Abolins, M. , et al. (2013) In Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics 721(1-3). p.32-50
Abstract
A search is performed for collimated muon pairs displaced from the primary vertex produced in the decay of long-lived neutral particles in proton-proton collisions at root s = 7 TeV centre-of-mass energy, with the ATLAS detector at the LHC. In a 1.9 fb(-1) event sample collected during 2011, the observed data are consistent with the Standard Model background expectations. Limits on the product of the production cross section and the branching ratio of a Higgs boson decaying to hidden-sector neutral long-lived particles are derived as a function of the particles' mean lifetime. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.
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