# Search for long-lived neutral particles decaying into lepton jets in proton--proton collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector

Abstract : 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 $\sqrt{s}$ = 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-01060206
Contributor : Danielle Cristofol Connect in order to contact the contributor
Submitted on : Wednesday, September 3, 2014 - 10:36:51 AM
Last modification on : Tuesday, January 25, 2022 - 12:48:11 PM

### Citation

G. Aad, L. Alio, M. Barbero, J. C. Clémens, Y. Coadou, et al.. Search for long-lived neutral particles decaying into lepton jets in proton--proton collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector. Journal of High Energy Physics, Springer, 2014, 2014 (11), pp.088. ⟨10.1007/JHEP11(2014)088⟩. ⟨in2p3-01060206⟩

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