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

journal contribution
posted on 2023-06-08, 17:51 authored by Iacopo Vivarelli, Fabrizio SalvatoreFabrizio Salvatore, Antonella De SantoAntonella De Santo, Alessandro CerriAlessandro Cerri, K Suruliz, U De Sanctis, Mark SuttonMark Sutton, T Potter, C Chavez Barajas, et al., ATLAS Collaboration
The results of a search for pair production of light top squarks are presented, using 4.7 fb-1 of vs = 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 relation- ships 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.

History

Publication status

  • Published

File Version

  • Published version

Journal

Physics Letters B

ISSN

0370-2693

Publisher

Elsevier

Issue

1-3

Volume

720

Page range

13-31

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2014-07-17

First Compliant Deposit (FCD) Date

2014-07-17

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