Search for light scalar top-quark pair production in final states with two leptons with the ATLAS detector in √s =7 TeV proton–proton collisions

The ATLAS Collaboration

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

A search is presented for the pair production of light scalar top quarks in √s = 7 TeV proton–proton collisions recorded with the ATLAS detector at the Large Hadron Collider. This analysis uses the full data sample collected during 2011 running that corresponds to a total integrated luminosity of 4.7 fb−1. Light scalar top quarks are searched for in events with two opposite-sign leptons (e, μ), large missing transverse momentum and at least one jet in the final state. No excess over Standard Model expectations is found, and the results are interpreted under the assumption that the light scalar top decays to a b-quark in addition to an on-shell chargino whose decay occurs through a virtual W boson. If the chargino mass is 106 GeV, light scalar top-quark masses up to 130 GeV are excluded for neutralino masses below 70 GeV.

Original languageEnglish
Article number2237
JournalEuropean Physical Journal C
Volume72
Issue number11
DOIs
Publication statusPublished - Nov 30 2012
Externally publishedYes

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pair production
leptons
quarks
scalars
Detectors
collisions
detectors
Bosons
Colliding beam accelerators
decay
transverse momentum
Luminance
Momentum
bosons
luminosity

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Engineering (miscellaneous)

Cite this

Search for light scalar top-quark pair production in final states with two leptons with the ATLAS detector in √s =7 TeV proton–proton collisions. / The ATLAS Collaboration.

In: European Physical Journal C, Vol. 72, No. 11, 2237, 30.11.2012.

Research output: Contribution to journalArticle

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abstract = "A search is presented for the pair production of light scalar top quarks in √s = 7 TeV proton–proton collisions recorded with the ATLAS detector at the Large Hadron Collider. This analysis uses the full data sample collected during 2011 running that corresponds to a total integrated luminosity of 4.7 fb−1. Light scalar top quarks are searched for in events with two opposite-sign leptons (e, μ), large missing transverse momentum and at least one jet in the final state. No excess over Standard Model expectations is found, and the results are interpreted under the assumption that the light scalar top decays to a b-quark in addition to an on-shell chargino whose decay occurs through a virtual W boson. If the chargino mass is 106 GeV, light scalar top-quark masses up to 130 GeV are excluded for neutralino masses below 70 GeV.",
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AU - Abbott, B.

AU - Abdallah, J.

AU - Khalek, S. Abdel

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AU - Aharrouche, M.

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AU - Ahmad, A.

AU - Ahsan, M.

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AU - Akdogan, T.

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AU - Akimoto, G.

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AU - Alexopoulos, T.

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