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2021 Fall KIAS HEP Seminar Series
Frugal $U(1)_X$ models with non-minimal flavor violation for $b \to s \ell \ell$ anomalies and neutrino mixings
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Asia/Seoul
Description
Title: Frugal $U(1)_X$ models with non-minimal flavor violation for $b
\to s \ell \ell$ anomalies and neutrino mixings
Speaker: Dr. Disha Bhatia (IMSc)
Abstract: We present a class of $U(1)_X$ models which are can simultaneously explain the neutrino mixings and flavor anomalies in neutral B decays. The frugal set up apart from additional $Z^\prime$, requires additional singlet scalar for neutrino mixings and an additional scalar doublet for quark mixings. Our set up identifies a class of symmetries wherein all generations of quarks are necessarily charged, rendering collider constraints to be stringent. We show all our models with the assumption of CKM-like mixings are ruled out from the current data. Introduction of a single source parameter for non-minimal mixings allows for a wider class of models consistent with the data. We show the viable symmetry patterns are of the form $L_e - 3 L_\mu - L_\tau$, $L_e - 3 L_\mu + L_\tau$, and $L_e + 3 L_\mu - L_\tau$.
