Time & Place: April 12, Friday, 10:00am, Room 9409

Speaker: Prof. Yi Liao (廖益), Nankai University

Title: Effective field theory approach to lepton number violation:
dimension seven operators

Abstract: Effective field theory offers an appropriate approach to
lepton-number violating processes at low energy and to connecting to
origin of lepton number violation at high energy scale. In this talk
I'll focus on dimension seven operators appearing in standard model
effective field theory. I'll discuss their completeness and
independence, and their renormalization. I'll explain how to extract
anomalous dimensions for a suitably chosen basis of operators
constrained by nontrivial flavor relations. As simple illustrations,
I'll estimate renormalization effects on neutrinoless double beta decay
and unusual proton decay.