$B\to K\nu \bar{\nu }$, 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.

arXiv comment9 pages, 3 figures, 3 tables. Version to appear as a Letter in PRD

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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