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Search for the Higgs Boson Produced in Association with a W Boson at CDF Run II

Slaunwhite, Jason M.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1232121462

Abstract Details

2009, Doctor of Philosophy, Ohio State University, Physics.
We present a search for standard model Higgs boson production in association with a W boson in proton-antiproton collisions (pp̄ → W±H → ℓνbb̄) at a center of mass energy of 1.96 TeV. WH candidate events have a signature of a single lepton (e±/µ±), missing transverse energy, and two jets. The search looks for candidate events in approximately 2.7 fb-1 of data recorded with the CDF II detector. The high transverse momentum (high-pT) lepton (electron or muon) in the events provides a distinct signature for triggering and most of the events in the dataset come from high-pT lepton triggers. Our analysis improves on prior searches by including events recorded on the Missing Transverse Energy (MET) plus 2 jets trigger with a lepton reconstructed as an isolated high-pT charged particle. We increase the sample purity by identifying (“tagging”) long-lived b-hadrons in jets. A neural network combines distinguishing kinematic information into a function optimized for WH sensitivity. The neural network output distributions are consistent with the standard model background expectations and we set limits upper limits on the rate of Higgs production. We set 95% confidence level upper limits on the WH production cross section times branching ratio for Higgs masses from 100 to 150 GeV/c2 and express our results as a ratio of the experimental limit to the theoretical Standard Model production rate. Our limits range from 3.6 (4.3 expected) to 61.1 (43.2 expected) for Higgs masses from 100 to 150 GeV/c2, respectively.
Richard Hughes, PhD (Advisor)
Brian Winer, PhD (Committee Member)
Junko Shigemitsu, PhD (Committee Member)
Johnston-Halperin Ezekeil, PhD (Committee Member)
142 p.
Physics
higgs boson; w-higgs associated production; cdf; high-energy physics; high transverse momentum physics;

Recommended Citations

Citations

  • Slaunwhite, J. M. (2009). Search for the Higgs Boson Produced in Association with a W Boson at CDF Run II [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1232121462

    APA Style (7th edition)

  • Slaunwhite, Jason. Search for the Higgs Boson Produced in Association with a W Boson at CDF Run II. 2009. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1232121462.

    MLA Style (8th edition)

  • Slaunwhite, Jason. "Search for the Higgs Boson Produced in Association with a W Boson at CDF Run II." Doctoral dissertation, Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1232121462

    Chicago Manual of Style (17th edition)

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© 2009, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.