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[submitted] Journal of High Energy Physics

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Search for long-lived neutral particles decaying into lepton jets in proton--proton collisions at √s = 8 TeV with the ATLAS detector s8 TeV with the ATLAS detector
ATLAS Collaboration (Georges Aad (Marseille, CPPMet al.) Show all 2903 authors

Sep 2, 2014 - 30 pages

Abstract (arXiv)

Several models of physics beyond the Standard Model predict neutral particles that decay into final states consisting of collimated jets of light leptons and hadrons (so-called "lepton jets"). These particles can also be long-lived with decay length comparable to, or even larger than, the LHC detectors' linear dimensions. This paper presents the results of a search for lepton jets in proton--proton collisions at the centre-of-mass energy of √s = 8 TeV in a sample of 20.3 fb−1 collected during 2012 with the ATLAS detector at the LHC. Limits on models predicting Higgs boson decays to neutral long-lived lepton jets are derived as a function of the particle's proper decay length.


Note: *Temporary entry* 
Note: 30 pages plus author list + cover pages (53 pages total), 17 figures, 11 tables, submitted to JHEP. Replacement of authorlist. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2013-22/ 
Keyword(s): INSPIRE: * Automatic Keywords * | decay: length | lepton: long-lived | neutral particle: long-lived | Higgs particle: decay | CERN LHC CollATLAS | new physics | collimator | hadron

 


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Date: 30.09.2014 11:51:39 Count: 292