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

ATLAS Collaboration

Research output: Contribution to journalArticle

36 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 root 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 languageEnglish
Article number052001
JournalPhysical Review D
Volume90
Issue number5
DOIs
Publication statusPublished - 4 Sep 2014

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supersymmetry
leptons
collisions
detectors
muons
parity
protons
exclusion
confidence
electrons
bosons
deviation
decay
predictions

Keywords

  • PARITY VIOLATING DECAYS
  • MISSING TRANSVERSE-MOMENTUM
  • E(+)E(-) COLLISIONS
  • HADRON COLLIDERS
  • SUPERGAUGE TRANSFORMATIONS
  • PAIR PRODUCTION
  • MODEL
  • PARTICLES
  • ENERGY
  • BREAKING

Cite this

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title = "Search for supersymmetry in events with four or more leptons in root s=8 TeV pp collisions with the ATLAS detector",
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 root 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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author = "AD Wemans and {ATLAS Collaboration}",
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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. / ATLAS Collaboration.

In: Physical Review D, Vol. 90, No. 5, 052001, 04.09.2014.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Search for supersymmetry in events with four or more leptons in root s=8 TeV pp collisions with the ATLAS detector

AU - Wemans, AD

AU - ATLAS Collaboration

PY - 2014/9/4

Y1 - 2014/9/4

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 root 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 root 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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KW - E(+)E(-) COLLISIONS

KW - HADRON COLLIDERS

KW - SUPERGAUGE TRANSFORMATIONS

KW - PAIR PRODUCTION

KW - MODEL

KW - PARTICLES

KW - ENERGY

KW - BREAKING

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