2017 Meeting of the APS Division of Particles and Fields (DPF 2017)

Charged Lepton Flavor Violation in Electron-Positron Scattering: Calculations of Cross Section and Asymmetry Using an Effective Field Theory

31 Jul 2017, 18:50

1m

Reception Area (Fermi National Accelerator Laboratory)

Poster Quark and Lepton Flavor Poster Session and Reception

Speaker

Mr Ching Li (Haverford College)

Description

We performed theoretical calculations of charged lepton flavor violation (CLFV) cross sections and asymmetries in electron-positron scattering. Examples of CLFV include electron antitau final states and electron antimuon final states. We used an effective field theory that incorporated three types of Beyond Standard Model operators: leptonic operators and radiative operators leading to tree-level diagrams and quark-lepton operators leading to a one-loop diagram. The one-loop diagram was treated in two ways: perturbatively using Standard Model Feynman Rules and non-perturbatively using dispersion relations to account for possible resonance effects. We calculated constraints on the effective coupling constants from current experimental upper bounds. Future colliders such as Belle II and BES III can use our calculations in searches for charged lepton flavor violation.