22-29 July 2015
Europe/Vienna timezone

Violation of lepton flavour universality in composite Higgs models

Jul 23, 2015, 9:45 AM
15m
HS21

HS21

talk Flavour Physics and Fundamental Symmetries Flavour Physics and Fundamental Symmetries

Speaker

Peter Stangl (Excellence Cluster Universe, Munich)

Description

We investigate whether the $2.6\sigma$ deviation from lepton flavour universality in $B^+\to K^+\ell^+\ell^-$ decays recently observed at the LHCb experiment can be explained in minimal composite Higgs models. We show that a visible departure from universality is indeed possible if left-handed muons have a sizable degree of compositeness. Constraints from $Z$-pole observables are avoided by a custodial protection of the muon coupling.

Primary authors

Christoph Niehoff (Excellence Cluster Universe, Munich) David Straub (Excellence Cluster Universe, Munich) Peter Stangl (Excellence Cluster Universe, Munich)

Presentation materials