Speaker
Rodrigo Alonso
(UC San Diego)
Description
Flavor physics offers a formidable window into new physics. In particular
rare B-meson decays have received a great share of attention due to recent
anomalous measurements. The customary Effective Field Theory scheme
parametrizes deviations from the Standard Theory at the B meson scale with
operators invariant under electro-magnetism and the strong interactions.
However, if the scale of new physics lies above the electro-weak scale, the
customary operators must originate from electro-weak invariant ones. This
implies a sizable simplification of the analysis via a reduction of the
independent operators.
On the other hand, one of the most prominent anomalies is the measured
ratio of the decays of a B meson to a kaon, a muon and an anti-muon vs a kaon,
an electron and a positron. This ratio differs from one, hinting at lepton
universality violation. This is a rather unexpected result, specially
in the present absence of lepton flavor violation. We will explore the naturalness
of the former without the latter both in an EFT and with a specific model.
Primary author
Rodrigo Alonso
(UC San Diego)
Co-authors
Prof.
Benjamin Grinstein
(Univ. of California San Diego (US))
Jorge Martin Camalich
