Electronic Theses and Dissertations

Date of Award


Document Type


Degree Name

Ph.D. in Physics


Physics and Astronomy

First Advisor

Alakabha Datta

Second Advisor

Gavin Davies

Third Advisor

Lucien Cremaldi

Relational Format



In this research, I have tested the standard model(SM) and various new physics (NP) models using B and D meson decays. In D meson decays, the SU(3) flavor symmetry of the SM for Cabibbo favored decays is tested against experimental measurements. The SU(3) analysis with η and η′ are considered in a general and consistent way for the first time. In B decays, a fit to the data for four B → πK decays is performed, within the SM and with NP. The fit confirms that the SM gives a poor fit to the B → πK data which is known as the B → πK ”puzzle”. A solution to the B → πK ”puzzle” is presented in terms of an axion like particle (ALP) with a mass near the neutral pion mass. Several search strategies to observe this particle in various experiments have also been explored. Finally, an explanation of the B → πK ”puzzle” via the presence of diquarks is considered. The possibility to generate neutrino masses and mixing via a combination of diquarks and leptoquarks is also discussed. The leptoquark can account for the lepton universality violating anomalies in semileptonic B decays.



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