Search for supersymmetry in events with four or more leptons in root s=8 TeV pp collisions with the ATLAS detector

G. Aad; B. Abbott; J. Abdallah; S.A. Khalek; O. Abdinov; R. Aben; B. Abi; M. Abolins; O.S. AbouZeid; H. Abramowicz; H. Abreu; Mogens Dam; Jørn Dines Hansen; Peter Henrik Hansen; Jørgen Beck Hansen; Morten Dam Jørgensen; Almut Maria Pingel; Stefania Xella; Troels Christian Petersen; Graig Wiglesworth; Lotte Ansgaard Thomsen; Margar Simonyan; Ask Emil Løvschall-Jensen; Alejandro Alonso Diaz; Gorm Aske Gram Krohn Galster; Sascha Mehlhase; James William Monk

doi:10.1103/PhysRevD.90.052001

Search for supersymmetry in events with four or more leptons in root s=8 TeV pp collisions with the ATLAS detector

G. Aad, B. Abbott, J. Abdallah, S.A. Khalek, O. Abdinov, R. Aben, B. Abi, M. Abolins, O.S. AbouZeid, H. Abramowicz, H. Abreu, Mogens Dam, Jørn Dines Hansen, Peter Henrik Hansen, Jørgen Beck Hansen, Morten Dam Jørgensen, Almut Maria Pingel, Stefania Xella, Troels Christian Petersen, Graig WiglesworthLotte Ansgaard Thomsen, Margar Simonyan, Ask Emil Løvschall-Jensen, Alejandro Alonso Diaz, Gorm Aske Gram Krohn Galster, Sascha Mehlhase, James William Monk

Experimental Particle Physics

38 Citations (Scopus)

Abstract

Results from a search for supersymmetry in events with four or more leptons including electrons, muons and taus are presented. The analysis uses a data sample corresponding to 20.3 fb-1 of proton-proton collisions delivered by the Large Hadron Collider at s=8 TeV and recorded by the ATLAS detector. Signal regions are designed to target supersymmetric scenarios that can be either enriched in or depleted of events involving the production of a Z boson. No significant deviations are observed in data from standard model predictions and results are used to set upper limits on the event yields from processes beyond the standard model. Exclusion limits at the 95% confidence level on the masses of relevant supersymmetric particles are obtained. In R-parity-violating simplified models with decays of the lightest supersymmetric particle to electrons and muons, limits of 1350 and 750 GeV are placed on gluino and chargino masses, respectively. In R-parity-conserving simplified models with heavy neutralinos decaying to a massless lightest supersymmetric particle, heavy neutralino masses up to 620 GeV are excluded. Limits are also placed on other supersymmetric scenarios.

Original language	English
Article number	052001
Journal	Physical Review D (Particles, Fields, Gravitation and Cosmology)
Volume	90
Issue number	5
ISSN	1550-7998
DOIs	https://doi.org/10.1103/PhysRevD.90.052001
Publication status	Published - 4 Sept 2014

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Aad, G., Abbott, B., Abdallah, J., Khalek, S. A., Abdinov, O., Aben, R., Abi, B., Abolins, M., AbouZeid, O. S., Abramowicz, H., Abreu, H., Dam, M., Hansen, J. D., Hansen, P. H., Hansen, J. B., Jørgensen, M. D., Pingel, A. M., Xella, S., Petersen, T. C., ... Monk, J. W. (2014). Search for supersymmetry in events with four or more leptons in root s=8 TeV pp collisions with the ATLAS detector. Physical Review D (Particles, Fields, Gravitation and Cosmology), 90(5), [052001]. https://doi.org/10.1103/PhysRevD.90.052001

Aad, G, Abbott, B, Abdallah, J, Khalek, SA, Abdinov, O, Aben, R, Abi, B, Abolins, M, AbouZeid, OS, Abramowicz, H, Abreu, H, Dam, M , Hansen, JD , Hansen, PH , Hansen, JB, Jørgensen, MD, Pingel, AM, Xella, S , Petersen, TC , Wiglesworth, G, Thomsen, LA, Simonyan, M, Løvschall-Jensen, AE, Alonso Diaz, A, Galster, GAGK, Mehlhase, S & Monk, JW 2014, 'Search for supersymmetry in events with four or more leptons in root s=8 TeV pp collisions with the ATLAS detector', Physical Review D (Particles, Fields, Gravitation and Cosmology), vol. 90, no. 5, 052001. https://doi.org/10.1103/PhysRevD.90.052001

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AU - Abdinov, O.

AU - Aben, R.

AU - Abi, B.

AU - Abolins, M.

AU - AbouZeid, O.S.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Dam, Mogens

AU - Hansen, Jørn Dines

AU - Hansen, Peter Henrik

AU - Hansen, Jørgen Beck

AU - Jørgensen, Morten Dam

AU - Pingel, Almut Maria

AU - Xella, Stefania

AU - Petersen, Troels Christian

AU - Wiglesworth, Graig

AU - Thomsen, Lotte Ansgaard

AU - Simonyan, Margar

AU - Løvschall-Jensen, Ask Emil

AU - Alonso Diaz, Alejandro

AU - Galster, Gorm Aske Gram Krohn

AU - Mehlhase, Sascha

AU - Monk, James William

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N2 - Results from a search for supersymmetry in events with four or more leptons including electrons, muons and taus are presented. The analysis uses a data sample corresponding to 20.3 fb-1 of proton-proton collisions delivered by the Large Hadron Collider at s=8 TeV and recorded by the ATLAS detector. Signal regions are designed to target supersymmetric scenarios that can be either enriched in or depleted of events involving the production of a Z boson. No significant deviations are observed in data from standard model predictions and results are used to set upper limits on the event yields from processes beyond the standard model. Exclusion limits at the 95% confidence level on the masses of relevant supersymmetric particles are obtained. In R-parity-violating simplified models with decays of the lightest supersymmetric particle to electrons and muons, limits of 1350 and 750 GeV are placed on gluino and chargino masses, respectively. In R-parity-conserving simplified models with heavy neutralinos decaying to a massless lightest supersymmetric particle, heavy neutralino masses up to 620 GeV are excluded. Limits are also placed on other supersymmetric scenarios.

AB - Results from a search for supersymmetry in events with four or more leptons including electrons, muons and taus are presented. The analysis uses a data sample corresponding to 20.3 fb-1 of proton-proton collisions delivered by the Large Hadron Collider at s=8 TeV and recorded by the ATLAS detector. Signal regions are designed to target supersymmetric scenarios that can be either enriched in or depleted of events involving the production of a Z boson. No significant deviations are observed in data from standard model predictions and results are used to set upper limits on the event yields from processes beyond the standard model. Exclusion limits at the 95% confidence level on the masses of relevant supersymmetric particles are obtained. In R-parity-violating simplified models with decays of the lightest supersymmetric particle to electrons and muons, limits of 1350 and 750 GeV are placed on gluino and chargino masses, respectively. In R-parity-conserving simplified models with heavy neutralinos decaying to a massless lightest supersymmetric particle, heavy neutralino masses up to 620 GeV are excluded. Limits are also placed on other supersymmetric scenarios.

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Search for supersymmetry in events with four or more leptons in root s=8 TeV pp collisions with the ATLAS detector

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