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