July 31, 2017 to August 4, 2017
Fermi National Accelerator Laboratory
US/Central timezone

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

Jul 31, 2017, 6:50 PM
Reception Area (Fermi National Accelerator Laboratory)

Reception Area

Fermi National Accelerator Laboratory

Poster Quark and Lepton Flavor Poster Session and Reception


Mr Ching Li (Haverford College)


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.

Primary authors

Prof. Alexey Petrov (Wayne State University / MCTP) Mr Ching Li (Haverford College)

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