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Author ORCID Identifier
https://orcid.org/0009-0001-8239-2567
AccessType
Campus-Only Access for One (1) Year
Document Type
dissertation
Degree Name
Doctor of Philosophy (PhD)
Degree Program
Physics
Year Degree Awarded
2023
Month Degree Awarded
May
First Advisor
Michael Ramsey-Musolf
Subject Categories
Elementary Particles and Fields and String Theory
Abstract
The cosmic matter-antimatter asymmetry and the origin of the mass of neutrinos are two of the questions that the standard model(SM) cannot explain. The study of the possibility of lepton number violation(LNV) will shed light on both of the two questions. On one hand, if LNV process probed by neutrinoless double beta decay(0νββ-decay) experiment exists, this will show the Majorana nature of neutrino masses. In this work, a new physics model with a heavy scalar and Majorana fermion at LHC level will be studied for its contribution to 0νββ-decay with constraints from collider simulation. One the other hand, a TeV level LNV may also falsify the usual vi ultrahigh scale leptogenesis mechanism for baryon asymmetry. The above model is studied to show this point. Another proposed mechanism, electroweak baryogenesis for matter-antimatter requires more CP violation(CPV) source than that current SM can provide. As permanent electric dipole moments (EDMs) of elementary particles and composite systems are good probe for beyond SM CPV, in this work a scalar leptoquark(LQ) model with its parameter constraints from beta decay and collider physics is studied for its contribution to EDM.
DOI
https://doi.org/10.7275/35000576
Recommended Citation
Shen, Tianyang, "FUNDAMENTAL SYMMETRY PROBE: LEPTON NUMBER, CP AND THEIR IMPLICATIONS" (2023). Doctoral Dissertations. 2859.
https://doi.org/10.7275/35000576
https://scholarworks.umass.edu/dissertations_2/2859