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    Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method.

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    Khachatryan_2015.pdf (1.088Mb)
    Issue Date
    2015
    Author
    Khachatryan, V.
    Baringer, Philip S.
    Bean, Alice
    Publisher
    Springer
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
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    Abstract
    A search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks is presented. Events with hadronic jets and one or two oppositely charged leptons are selected from a data sample corresponding to an integrated luminosity of 19.5 fb-1 collected by the CMS experiment at the LHC in pp collisions at a centre-of-mass energy of 8 TeV. In order to separate the signal from the larger tt¯ + jets background, this analysis uses a matrix element method that assigns a probability density value to each reconstructed event under signal or background hypotheses. The ratio between the two values is used in a maximum likelihood fit to extract the signal yield. The results are presented in terms of the measured signal strength modifier, μ, relative to the standard model prediction for a Higgs boson mass of 125 GeV. The observed (expected) exclusion limit at a 95 % confidence level is μ < 4.2 (3.3), corresponding to a best fit value μ^=1.2+1.6−1.5.
    URI
    http://hdl.handle.net/1808/18230
    DOI
    https://doi.org/10.1140/epjc/s10052-015-3454-1.
    Collections
    • Physics & Astronomy Scholarly Works [1713]
    Citation
    Khachatryan V, Sirunyan AM, Tumasyan A, et al. Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method. The European Physical Journal C, Particles and Fields. 2015;75(6):251. http://dx.doi.org/10.1140/epjc/s10052-015-3454-1.

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    Lawrence, KS 66045
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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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