A flavor-safe composite explanation of $R_K$

Abstract

In these proceedings we discuss a flavor-safe explanation of the anomaly found in $R_K=\mathcal{B}(B\to K{\mu }^{+}{\mu }^{-})/\mathcal{B}(B\to K{e}^{+}{e}^{-})$ by LHCb, within the framework of composite Higgs models. We present a model featuring a non-negligible degree of compositeness for all three generations of right-handed leptons, which leads to a violation of lepton-flavor universality in neutral current interactions while other constraints from quark- and lepton-flavor physics are met. Moreoever, the particular embedding of the lepton sector considered in this setup provides a parametrically enhanded contribution to the Higgs mass that can weak considerably the need for ultra-light top partners.

arXiv comment6 pages, 4 figures. Contribution to the proceedings of the 6th Workshop on Theory, Phenomenology and Experiments in Flavour Physics (Capri 2016). Anacapri, Capri, June 2016

References in corpus (20)

• The Minimal Composite Higgs Model
• Higgs as a Holographic Pseudo-Goldstone Boson
• Observation of the rare $B_s^0\to {\mu }^{+}{\mu }^{-}$ decay from the combined analysis of CMS and LHCb data
• B_{s,d} -> l+ l- in the Standard Model with Reduced Theoretical Uncertainty
• More Model-Independent Analysis of b->s Processes
• On the Standard Model predictions for $R_K$ and $R_{K^{\ast }}$
• Flavour physics of leptons and dipole moments
• Addressing the LHC flavour anomalies with horizontal gauge symmetries
• An evaluation of |Vus| and precise tests of the Standard Model from world data on leptonic and semileptonic kaon decays
• Hint of Lepton Flavour Non-Universality in $B$ Meson Decays
• Family non-universal Z' models with protected flavor-changing interactions
• Lepton Flavor Non-Universality in B-meson Decays from a U(2) Flavor Model
• Flavor from Minimal Flavor Violation & a Viable Randall-Sundrum Model
• Violation of lepton flavour universality in composite Higgs models
• Natural Neutrino Masses and Mixings from Warped Geometry
• Lepton Flavor and Non-Universality from Minimal Composite Higgs Setups
• Toward a coherent solution of diphoton and flavor anomalies
• Stringy explanation of $b\to s{\ell }^{+}{\ell }^{-}$ anomalies
• Standard Model updates and new physics analysis with the Unitarity Triangle fit
• Long-distance weak annihilation contribution to the $B^{\pm }\to ({\pi }^{\pm },K^{\pm }){\ell }^{+}{\ell }^{-}$ decays