Search for long-lived neutral particles decaying into lepton jets in proton--proton collisions at s√ = 8 TeV with the ATLAS detector

G. Aad; B. Abbott; J. Abdallah; Mogens Dam; Jørn Dines Hansen; Jørgen Beck Hansen; Peter Henrik Hansen; Stefania Xella; Troels Christian Petersen; Sascha Mehlhase; James William Monk; Lotte Ansgaard Thomsen; Morten Dam Jørgensen; Almut Maria Pingel; Ask Emil Løvschall-Jensen; Alejandro Alonso Diaz; Lars Egholm Pedersen; Graig Wiglesworth; Gorm Aske Gram Krohn Galster

doi:10.1007/JHEP11(2014)088

Search for long-lived neutral particles decaying into lepton jets in proton--proton collisions at s√ = 8 TeV with the ATLAS detector

G. Aad, B. Abbott, J. Abdallah, Mogens Dam, Jørn Dines Hansen, Jørgen Beck Hansen, Peter Henrik Hansen, Stefania Xella, Troels Christian Petersen, Sascha Mehlhase, James William Monk, Lotte Ansgaard Thomsen, Morten Dam Jørgensen, Almut Maria Pingel, Ask Emil Løvschall-Jensen, Alejandro Alonso Diaz, Lars Egholm Pedersen, Graig Wiglesworth, Gorm Aske Gram Krohn Galster

Experimental Particle Physics

62 Citations (Scopus)

Abstract

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 √s= 8TeV 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.

Original language	English
Article number	088
Journal	Journal of High Energy Physics (Online)
Volume	2014
Number of pages	30
ISSN	1126-6708
DOIs	https://doi.org/10.1007/JHEP11(2014)088
Publication status	Published - 2 Sept 2014

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Aad, G., Abbott, B., Abdallah, J., Dam, M., Hansen, J. D., Hansen, J. B., Hansen, P. H., Xella, S., Petersen, T. C., Mehlhase, S., Monk, J. W., Thomsen, L. A., Jørgensen, M. D., Pingel, A. M., Løvschall-Jensen, A. E., Alonso Diaz, A., Pedersen, L. E., Wiglesworth, G., & Galster, G. A. G. K. (2014). Search for long-lived neutral particles decaying into lepton jets in proton--proton collisions at s√ = 8 TeV with the ATLAS detector. Journal of High Energy Physics (Online), 2014, Article 088. https://doi.org/10.1007/JHEP11(2014)088

Aad, G, Abbott, B, Abdallah, J, Dam, M , Hansen, JD , Hansen, JB , Hansen, PH , Xella, S , Petersen, TC, Mehlhase, S, Monk, JW, Thomsen, LA, Jørgensen, MD, Pingel, AM, Løvschall-Jensen, AE, Alonso Diaz, A, Pedersen, LE, Wiglesworth, G & Galster, GAGK 2014, 'Search for long-lived neutral particles decaying into lepton jets in proton--proton collisions at s√ = 8 TeV with the ATLAS detector', Journal of High Energy Physics (Online), vol. 2014, 088. https://doi.org/10.1007/JHEP11(2014)088

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title = "Search for long-lived neutral particles decaying into lepton jets in proton--proton collisions at s√ = 8 TeV with the ATLAS detector",

abstract = "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{\textquoteright} 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= 8TeV 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{\textquoteright}s proper decay length.",

author = "G. Aad and B. Abbott and J. Abdallah and Mogens Dam and Hansen, {J{\o}rn Dines} and Hansen, {J{\o}rgen Beck} and Hansen, {Peter Henrik} and Stefania Xella and Petersen, {Troels Christian} and Sascha Mehlhase and Monk, {James William} and Thomsen, {Lotte Ansgaard} and J{\o}rgensen, {Morten Dam} and Pingel, {Almut Maria} and L{\o}vschall-Jensen, {Ask Emil} and {Alonso Diaz}, Alejandro and Pedersen, {Lars Egholm} and Graig Wiglesworth and Galster, {Gorm Aske Gram Krohn}",

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doi = "10.1007/JHEP11(2014)088",

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T1 - Search for long-lived neutral particles decaying into lepton jets in proton--proton collisions at s√ = 8 TeV with the ATLAS detector

AU - Aad, G.

AU - Abbott, B.

AU - Abdallah, J.

AU - Dam, Mogens

AU - Hansen, Jørn Dines

AU - Hansen, Jørgen Beck

AU - Hansen, Peter Henrik

AU - Xella, Stefania

AU - Petersen, Troels Christian

AU - Mehlhase, Sascha

AU - Monk, James William

AU - Thomsen, Lotte Ansgaard

AU - Jørgensen, Morten Dam

AU - Pingel, Almut Maria

AU - Løvschall-Jensen, Ask Emil

AU - Alonso Diaz, Alejandro

AU - Pedersen, Lars Egholm

AU - Wiglesworth, Graig

AU - Galster, Gorm Aske Gram Krohn

PY - 2014/9/2

Y1 - 2014/9/2

N2 - 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 √s= 8TeV 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.

AB - 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 √s= 8TeV 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.

U2 - 10.1007/JHEP11(2014)088

DO - 10.1007/JHEP11(2014)088

M3 - Journal article

SN - 1126-6708

VL - 2014

JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

M1 - 088

ER -

Search for long-lived neutral particles decaying into lepton jets in proton--proton collisions at s√ = 8 TeV with the ATLAS detector

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