Dissertation/Thesis Abstract

Hadron collider tests of neutrino mass-generating mechanisms
by Ruiz, Richard Efrain, Ph.D., University of Pittsburgh, 2015, 222; 3735357
Abstract (Summary)

The Standard Model of particle physics (SM) is presently the best description of nature at small distances and high energies. However, with tiny but nonzero neutrino masses, a Higgs boson mass unstable under radiative corrections, and little guidance on understanding the hierarchy of fermion masses, the SM remains an unsatisfactory description of nature. Well-motivated scenarios that resolve these issues exist but also predict extended gauge (e.g., Left-Right Symmetric Models), scalar (e.g., Supersymmetry), and/or fermion sectors (e.g., Seesaw Models). Hence, discovering such new states would have far-reaching implications.

After reviewing basic tenets of the SM and collider physics, several beyond the SM (BSM) scenarios that alleviate these shortcomings are investigated. Emphasis is placed on the production of a heavy Majorana neutrinos at hadron colliders in the context of low-energy, effective theories that simultaneously explain the origin of neutrino masses and their smallness compared to other elementary fermions, the so-called Seesaw Mechanisms. As probes of new physics, rare top quark decays to Higgs bosons in the context of the SM, the Types I and II Two Higgs Doublet Model (2HDM), and the semi-model independent framework of Effective Field Theory (EFT) have also been investigated. Observation prospects and discovery potentials of these models at current and future collider experiments are quantified.

Indexing (document details)
Advisor: Han, Tao
Commitee:
School: University of Pittsburgh
School Location: United States -- Pennsylvania
Source: DAI-B 77/04(E), Dissertation Abstracts International
Source Type: DISSERTATION
Subjects: Theoretical physics, Particle physics
Keywords: Beyond standard model, Collider phenomenology, Hadron collider, Neutrino mass, Neutrino physics, Seesaw mechanisms
Publication Number: 3735357
ISBN: 9781339241869
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