Building models for B physics anomalies

by Dario Buttazzo (INFN), Dario Buttazzo (Universität Zürich), Dario Buttazzo (Scuola Normale Superiore, Pisa), Dario Buttazzo (Technische Universitaet Muenchen (DE))

Thursday 12 Apr 2018, 14:00 → 15:00 Europe/Zurich

Other Institutes

Several different experiments show evidences of Lepton Flavour
Universality violation in semileptonic B meson decays, both in charged
and neutral currents. These anomalies can be interpreted in terms of
new short-distance interactions that involve mainly the third
generation of fermions. I will first discuss the present status of the
anomalies, and their connection to other low-and high-energy
observables, in a model-independent way, adopting an Effective Field
Theory approach based on a CKM-like flavour structure. I will then
extend the analysis to a few simple UV completions with different
types of mediator, discussing the main issues that have to be faced in
each case. A few models emerge, which look capable of accommodating
both charged- and neutral-current anomalies consistently with all the
experimental bounds, with associated flavour and high-pT signatures
within the reach of present and future experiments.

buttazzo.pdf