August 30, 2021 to September 3, 2021
University of Innsbruck
Europe/Zurich timezone

【312】Global Analysis of Leptophilic Z' Bosons

Aug 31, 2021, 4:45 PM
Room B

Room B

Talk Nuclear, Particle- and Astrophysics (FAKT - TASK) Nuclear, Particle- & Astrophysics


Fiona Kirk (University of Zurich, PSI)


One of the most minimal and most studied extensions of the Standard Model of particle physics is the $Z'$ boson. The LHC bounds on $Z'$ bosons that couple to quarks are very strong, models involving leptophilic $Z'$ bosons are, however, much less constrained.
We perform global fits to leptophilic $Z'$ models, putting bounds on the $Z'$ couplings to leptons, and show correlations between flavour observables in simplified scenarios. In the case where $Z'$ bosons only couple flavour off-diagonally to muons and taus, we can explain the $(g-2)_\mu$ anomaly, as well as the hints for lepton flavour universality violation in $\tau \to \mu \nu \nu$.

Primary authors

Andreas Crivellin (Universitaet Zuerich (CH)) Andrzej Buras (Munich) Fiona Kirk (University of Zurich, PSI) Claudio Andrea Manzari Marc Montull Garcia (Deutsches Elektronen-Synchrotron DESY)

Presentation materials