University of Sussex
Browse
Rose,_Anthony.pdf (25.14 MB)

Search for supersymmetry in events with leptons (e, µ, t), jets and missing transverse energy with the ATLAS detector at the LHC

Download (25.14 MB)
thesis
posted on 2023-06-08, 16:29 authored by Anthony Rose
Two searches for events containing t-leptons, jets, large missing transverse momentum, and zero or one light leptons (l = e,µ) in the final state have been performed using proton-proton collision data at vs = 7 TeV, recorded with the ATLAS detector at the Large Hadron Collider. The first search was performed using 2:05fb-1 of the ATLAS data collected in 2011, and focused on the final state containing two hadronically decaying t-leptons. For the second search the dataset was extended to 4:7fb-1, and four separate channels (1t, 2t, t+e, t+µ) were combined for the final result. No excess above the Standard Model background expectation is observed and 95% CL visible cross-section upper limits for new phenomena are set. In the framework of gauge-mediated SUSY-breaking models (GMSB), exclusion limits on the GMSB mass scale ? are set at 54 TeV in the regions where the lightest ~t is the next-to-lightest SUSY particle (tan ß > 20). These limits provide the most stringent tests to date of GMSB models in a large part of the considered parameter space.

History

File Version

  • Published version

Pages

210.0

Department affiliated with

  • Physics and Astronomy Theses

Qualification level

  • doctoral

Qualification name

  • phd

Language

  • eng

Institution

University of Sussex

Full text available

  • Yes

Legacy Posted Date

2013-12-10

Usage metrics

    University of Sussex (Theses)

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC