• Login
    JavaScript is disabled for your browser. Some features of this site may not work without it.
    Measurement of the top-quark pair production cross section with soft muon b-tagging in pp collisions at [Square root] s = 7 TeV with the Atlas detector 
    •   QMRO Home
    • Queen Mary University of London Theses
    • Theses
    • Measurement of the top-quark pair production cross section with soft muon b-tagging in pp collisions at [Square root] s = 7 TeV with the Atlas detector
    •   QMRO Home
    • Queen Mary University of London Theses
    • Theses
    • Measurement of the top-quark pair production cross section with soft muon b-tagging in pp collisions at [Square root] s = 7 TeV with the Atlas detector
    ‌
    ‌

    Browse

    All of QMROCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects
    ‌
    ‌

    Administrators only

    Login
    ‌
    ‌

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Measurement of the top-quark pair production cross section with soft muon b-tagging in pp collisions at [Square root] s = 7 TeV with the Atlas detector

    View/Open
    POLLMeasurementOf2011.pdf (50.92Mb)
    Publisher
    Queen Mary University of London
    Metadata
    Show full item record
    Abstract
    This thesis presents a study of the measurement of the top pair production cross section in the semileptonic decay channel with soft muon b-tagging at the Atlas detector using early LHC data. A theoretical overview of current research in particle physics, motivating the construction of the LHC and the Atlas detector is discussed followed by the main motivations behind a measurement of the top cross section. A summary of my work undertaken for the semiconductor tracker (SCT) collaboration on Atlas, including shift work and the refurbishment of the SR1 barrel sector and spare endcap disk is detailed. Following this the electron isolation in top and Z boson events was examined with Monte Carlo simulated events to optimise the selection criteria for electrons from W boson decay in top events. As part of the top cross section measurement, the e ciency and scale factor, compared to Monte Carlo studies, of using a 2 match cut on soft muons was calculated using the decay of the J= in early LHC data. The last chapter details the development of an analysis framework and measurement of the top pair production in the semileptonic decay channel with soft muon b-tagging. This measurement builds on the work in the previous chapters utilising both the electron isolation requirement from Monte Carlo simulations and the scale factor on the soft muon 2 match cut for b-tagging to yield a measurement of the top cross section in 2.9 pb􀀀1 of LHC data.
    Authors
    Poll, Andrew James
    URI
    http://qmro.qmul.ac.uk/xmlui/handle/123456789/2446
    Collections
    • Theses [3321]
    Copyright statements
    The copyright of this thesis rests with the author and no quotation from it or information derived from it may be published without the prior written consent of the author
    Twitter iconFollow QMUL on Twitter
    Twitter iconFollow QM Research
    Online on twitter
    Facebook iconLike us on Facebook
    • Site Map
    • Privacy and cookies
    • Disclaimer
    • Accessibility
    • Contacts
    • Intranet
    • Current students

    Modern Slavery Statement

    Queen Mary University of London
    Mile End Road
    London E1 4NS
    Tel: +44 (0)20 7882 5555

    © Queen Mary University of London.