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23–26 Sept 2025
DESY Hamburg
Europe/Berlin timezone

On-shell renormalization of vector-like leptons

24 Sept 2025, 14:30
15m
Main Auditorium (DESY)

Main Auditorium

DESY

Particle Phenomenology Parallel Sessions Wednesday Pheno 2

Speaker

Kilian Moehling (TU Dresden IKTP)

Description

Through tree-level mixing, vector-like leptons (VLL) can have a significant impact on the SM lepton mass generation, Higgs couplings and flavor (violating) observables. Precise predictions of these observables however require calculations beyond leading order, which necessitates the definition of a renormalization scheme.

In this talk, I present such a scheme, implementing on-shell conditions on the self-energies for the first time. I show how loop corrections to the mixing can be treated in a practicable way and discuss the impact of higher order corrections on observables, focusing in particular on the correlation between the g-2 and Higgs coupling of the muon, that serves as an important constraint on the VLL.

Primary author

Kilian Moehling (TU Dresden IKTP)

Co-authors

Dominik Stöckinger (TU Dresden) Dr Hyejung Stöckinger-Kim (TU Dresden IKTP)

Presentation materials