Upalaparna Banerjee, JGU Mainz, [HET Seminar], Probing axion-like particles in B-decays within weak effective theory
Small Seminar Room
https://bnl.zoomgov.com/j/1605506805?pwd=AA9rwL4hM5AwG2b0zEwDdXjzhvJjSz.1
Rare decays such as ๐ต โ ๐พ ๐ provide a sensitive window for probing axion-like particles (ALPs), especially for heavier ALPs with masses in the range of MeV to a few GeV.ย I'll present a detailed study of this decay within the framework of weak effective theory. I'll discuss how to consistently incorporate the ALPs, the usual set of effective operators must be extended by introducing additional higher mass-dimensional ones. The analysis focuses on scenarios where ALP couplings to Standard Model fermions are flavor-diagonal, with flavor-changing effects induced only through effective weak interactions. I'll present the implications for bounds on ALP couplings and contrast them with scenarios involving explicit flavor-changing ALP interactions; first in a model-independent framework, and then within UV completions with flavor-universal ALP couplings at the high energy scale.