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Prospecting for New Physics in the Higgs and Flavor Sectors

Bishara, Fady
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439295686

Abstract Details

2015, PhD, University of Cincinnati, Arts and Sciences: Physics.
We explore two directions in beyond the standard model physics: dark matter model building and probing new sources of CP violation. In dark matter model building, we consider two scenarios where the stability of dark matter derives from the flavor symmetries of the standard model. The first model contains a flavor singlet dark matter candidate whose couplings to the visible sector are proportional to the flavor breaking parameters. This leads to a metastable dark matter with TeV scale mediators. In the second model, we consider a fully gauged SU(3)3 flavor model with a flavor triplet dark matter. Consequently, the dark matter multiplet is charged while the standard model fields are neutral under a remnant Z3 which ensures dark matter stability. We show that a Dirac fermion dark matter with radiative splitting in the multiplet must have a mass in the range [0.5,5] TeV in order to satisfy all experimental constraints. We then turn our attention to Higgs portal dark matter and investigate the possibility of obtaining bounds on the up, down, and strange quark Yukawa couplings. If Higgs portal dark matter is discovered, we find that direct detection rates are insensitive to vanishing light quark Yukawa couplings. We then review flavor models and give the expected enhancement or suppression of the Yukawa couplings in those models. Finally, in the last two chapters, we develop techniques for probing CP violation in the Higgs coupling to photons and in rare radiative decays of B mesons. While theoretically clean, we find that these methods are not practical with current and planned detectors. However, these techniques can be useful with a dedicated detector (e.g., a gaseous TPC). In the case of radiative B meson decay B0
Jure Zupan, Ph.D. (Committee Chair)
Alexander Kagan, Ph.D. (Committee Member)
Michael Ma, Ph.D. (Committee Member)
Alan Schwartz, Ph.D. (Committee Member)
279 p.
Theoretical Physics
Beyond the standard model; CP violation; Dark matter; Higgs physics; Flavor physics; Collider phenomenology

Recommended Citations

Citations

  • Bishara, F. (2015). Prospecting for New Physics in the Higgs and Flavor Sectors [Doctoral dissertation, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439295686

    APA Style (7th edition)

  • Bishara, Fady. Prospecting for New Physics in the Higgs and Flavor Sectors. 2015. University of Cincinnati, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439295686.

    MLA Style (8th edition)

  • Bishara, Fady. "Prospecting for New Physics in the Higgs and Flavor Sectors." Doctoral dissertation, University of Cincinnati, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439295686

    Chicago Manual of Style (17th edition)

ucin1439295686
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© 2015, some rights reserved.Creative Commons License Prospecting for New Physics in the Higgs and Flavor Sectors by Fady Bishara is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Cincinnati and OhioLINK.