Abstract：
Baryon number is an accidental symmetry of the Standard Model action. Its violation is arguably one of the most compelling phenomena predicted by physics beyond the Standard Model and the focus of many experimental searches. In this seminar, we will present a model-independent analysis of baryon number violation using effective field theory. The first part of the seminar will focus on the contribution of dimension six and seven effective operators to |∆(B − L)| = 0, 2 nucleon decays. We obtain lower limits on the energy scale of each operator and study the correlations between different decay modes. For some operators the effect of renormalization group corrections is very significant. In the second part we go beyond dimension six and seven operators and obtain order-of-magnitude estimates for the matching contributions of generic ultraviolet models to effective operators that generate nucleon decay processes. The analysis is timely given the expected future sensitivities in numerous experiments such as Hyper-Kamiokande, DUNE, JUNO and THEIA.
Biography:
Dr Michael Schmidt is a Senior Lecturer at the School of Physics at the University of New South Wales Sydney. He obtained his Physik Diplom and PhD in Theoretical Particle Physics at the Technische Universität München in Germany, was a Research Fellow at the Institute for Particle Physics Phenomenology at the University of Durham and the University of Melbourne, and a Lecturer at the University of Sydney. Michael is well known for his research on quantum corrections to neutrino masses, the correct definition of a (generalized) CP symmetry in presence of a discrete flavour symmetry, and neutrino mass model building. Recently, he has been focussing on charged lepton flavour physics and the physics of semi-leptonic and rare B meson decays.
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