Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in √s=7 TeV proton–proton collisions

Atlas Collaboration

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

The results of a search for pair production of light top squarks are presented, using 4.7 fb−1 of s=7 TeV proton–proton collisions collected with the ATLAS detector at the Large Hadron Collider. This search targets top squarks with masses similar to, or lighter than, the top quark mass. Final states containing exclusively one or two leptons (e,μ), large missing transverse momentum, light-flavour jets and b-jets are used to reconstruct the top squark pair system. Event-based mass scale variables are used to separate the signal from a large tt¯ background. No excess over the Standard Model expectations is found. The results are interpreted in the framework of the Minimal Supersymmetric Standard Model, assuming the top squark decays exclusively to a chargino and a b-quark, while requiring different mass relationships between the Supersymmetric particles in the decay chain. Light top squarks with masses between 123–167 GeV are excluded for neutralino masses around 55 GeV.

Original languageEnglish (US)
Pages (from-to)13-31
Number of pages19
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume720
Issue number1-3
DOIs
StatePublished - Mar 13 2013
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Fingerprint Dive into the research topics of 'Search for light top squark pair production in final states with leptons and b-jets with the ATLAS detector in √s=7 TeV proton–proton collisions'. Together they form a unique fingerprint.

  • Cite this