$B\to K\nu \bar{\nu }$, MiniBooNE and muon $g-2$ anomalies from a dark sector

Abstract

Belle II has reported the first evidence for $B^{+}\to K^{+}\nu \bar{\nu }$ with a branching ratio $2.7\sigma$ higher than the standard model expectation. We explain this, and the MiniBooNE and muon anomalous magnetic moment anomalies in a model with a dark scalar that couples to a slightly heavier sterile Dirac neutrino and that communicates with the visible sector via a Higgs portal. We make predictions for rare kaon and other $B$ meson decays.

9 pages, 3 figures, 3 tables. Version to appear as a Letter in PRD

References in corpus (22)

• The anomalous magnetic moment of the muon in the Standard Model
• Measurement of the fine-structure constant as a test of the Standard Model
• FLAG Review 2021
• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.20 ppm
• Measurement of the very rare $K^{+}\to {\pi }^{+}\nu \bar{\nu }$ decay
• $\Delta M_s$ theory precision confronts flavour anomalies
• Enhanced electromagnetic correction to the rare $B$-meson decay $B_{s,d}\to {\mu }^{+}{\mu }^{-}$
• Test of lepton universality in $b\to s{\ell }^{+}{\ell }^{-}$ decays
• Standard Model predictions for $B\to K{\ell }^{+}{\ell }^{-}$, $B\to K{\ell }_1^{-}{\ell }_2^{+}$ and $B\to K\nu \bar{\nu }$ using form factors from $N_f=2+1+1$ lattice QCD
• Search for $K^{+}$ decays to a muon and invisible particles
• Search for $B^{+}\to K^{+}\nu \bar{\nu }$ decays using an inclusive tagging method at Belle II
• Search for ${\pi }^0$ decays to invisible particles
• Study of the $K_L\to {\pi }^0\nu \overline{\nu }$ Decay at the J-PARC KOTO Experiment
• Understanding the first measurement of $\mathcal{B}(B\to K\nu \bar{\nu })$
• Dark sector origin of the KOTO and MiniBooNE anomalies
• When Energy Goes Missing: New Physics in $b\to s\nu \nu$ with Sterile Neutrinos
• Impact of $B\to K\nu \bar{\nu }$ measurements on beyond the Standard Model theories
• FCNC $B$ and $K$ Meson Decays with Light Bosonic Dark Matter
• A Light Scalar Explanation of $(g-2{)}_{\mu }$ and the KOTO Anomaly
• $R_{K^{(\ast )}}^{\nu }$ and non-standard neutrino interactions
• Search for $B_s^0\to \gamma \gamma$ and a measurement of the branching fraction for $B_s^0\to \varphi \gamma$
• Review of Semileptonic $B$ Anomalies

Cited by in corpus (12)

• Decoding the $B\to K\nu \nu$ excess at Belle II: kinematics, operators, and masses
• Disentangling left and right-handed neutrino effects in $B\to K^{(\ast )}\nu \nu$
• Searching for signatures of new physics in $B\to K\nu \overline{\nu }$ to distinguish between Dirac and Majorana neutrinos
• Impact of new invisible particles on $B\to K^{(\ast )}{E}_{\mathrm{miss}}$ observables
• Analysis of $q_{\mathrm{rec}}^2$-distribution for $B\to K{M}_X$ and $B\to K^{\ast }{M}_X$ decays in a scalar-mediator dark-matter scenario
• Light dark-matter window constrained by \boldmath$K^{+}\to {\pi }^{+}$$+$$/E$
• Resonant ALP-Portal Dark Matter Annihilation as a Solution to the $B^{\pm }\to K^{\pm }\nu \bar{\nu }$ Excess
• Scrutinizing dark-matter scenarios with $B\to (K,K^{\ast })\bar{\nu }\nu$ decays
• Probing vector- vs scalar-mediator dark-matter scenarios in $B\to (K,K^{\ast })M_X$ decays
• Shedding light on the MiniBoone Excess with Searches at the LHC
• Belle II Constraints on the Non-Minimal Universal Extra Dimensional Model
• Dark Matter emission at Belle II and NA62 in Minimal Flavor Violation framework