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

ATLAS, Collaboration; Agustoni, Marco; Ancu, Lucian; Battaglia, Andreas; Beck, Hans Peter; Borer, Claudia; Ereditato, Antonio; Gallo, Valentina; Haug, Sigve; Kabana, Sonja; Kruker, Tobias; Marti, Lukas; Pretzl, Klaus; Schneider, Basil; Sciacca, Gianfranco; Topfel, Cyril; Weber, Michael (2013). Search for displaced muonic lepton jets from light Higgs boson decay in proton-proton collisions at sqrts TeV with the ATLAS detector. Physics letters. B, 721(1-3), pp. 32-50. Elsevier 10.1016/j.physletb.2013.02.058

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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.

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