Dark photon and dark $Z$ mediated $B$ meson decays

Abstract

We study flavor changing neutral current decays of $B$ and $K$ mesons in the dark $U(1{)}_D$ model, with the dark photon/dark $Z$ mass between 10 MeV and 2 GeV. Although the model provides an improved fit (compared to the standard model) to the differential decay distributions of $B\to K^{(\ast )}{\ell }^{+}{\ell }^{-}$, with $\ell =\mu ,e$, and $B_s\to \varphi {\mu }^{+}{\mu }^{-}$, the allowed parameter space is ruled out by measurements of atomic parity violation, $K^{+}\to {\mu }^{+}+invisible$ decay, and $B_s-{\overline{B}}_s$ mixing, among others. To evade constraints from low energy data, we extend the model to allow for (1) additional invisible $Z_D$ decay, (2) a direct vector coupling of $Z_D$ to muons, and (3) a direct coupling of $Z_D$ to both muons and electrons, with the electron coupling fine-tuned to cancel the $Z_D$ coupling to electrons via mixing. We find that only the latter case survives all constraints.

arXiv comment34 pages, 13 figures, 1 table. Updated with the LHCb results in 2212.09153. Version to appear in JHEP

References in corpus (45)

• Weak Decays Beyond Leading Logarithms
• The anomalous magnetic moment of the muon in the Standard Model
• New Results on B->pi, K, eta Decay Formfactors from Light-Cone Sum Rules
• FLAG Review 2019
• FLAG Review 2021
• $B\to V{\ell }^{+}{\ell }^{-}$ in the Standard Model from Light-Cone Sum Rules
• Serendipity in dark photon searches
• "Dark" Z implications for Parity Violation, Rare Meson Decays, and Higgs Physics
• $K^{+}\to {\pi }^{+}\nu \bar{\nu }$ and $K_L\to {\pi }^0\nu \bar{\nu }$ in the Standard Model: Status and Perspectives
• Search for $A^{\prime }\to {\mu }^{+}{\mu }^{-}$ decays
• Precision Measurement of the Weak Charge of the Proton
• Dark Neutrino Portal to Explain MiniBooNE excess
• $\Delta M_s$ theory precision confronts flavour anomalies
• Dark matter and a new gauge boson through kinetic mixing
• Higgs boson decays to four fermions through an abelian hidden sector
• The $B$ Anomalies and New Physics in $b\to s{e}^{+}{e}^{-}$
• Neutrino Tridents at DUNE
• New weakly-coupled forces hidden in low-energy QCD
• Extracting short-distance physics from K_{L,S} -> pi0 e+ e- decays
• A New Light Particle in B Decays?
• The K -> pi vector form factor at zero momentum transfer on the lattice
• Explaining the $R_K$ and $R_{K^{\ast }}$ anomalies
• KL to pi0 e+ e- and KL to pi0 mu+ mu- : A binary star on the stage of flavor physics
• Z'-induced FCNC decays of top, beauty and strange quarks
• Neutrino Masses and Mixings Dynamically Generated by a Light Dark Sector
• A light $Z^{\prime }$ for the $R_K$ puzzle and nonstandard neutrino interactions
• Exploring Light-Cone Sum Rules for Pion and Kaon Form Factors
• New light mediators for the $R_K$ and $R_{K^{\ast }}$ puzzles
• Isospin asymmetries in $B\to (K^{\ast },\rho )\gamma /l^{+}{l}^{-}$ and $B\to K{l}^{+}{l}^{-}$ in and beyond the Standard Model
• Muon and electron g-2 and proton and cesium weak charges implications on dark ${\mathbf{Z}}_{\mathbf{d}}$ models
• High statistic study of the K- -> pi0 mu- nu decay
• Light Resonances and the Low-$q^2$ Bin of $R_{K^{\ast }}$
• Nonstandard neutrino interactions at COHERENT, DUNE, T2HK and LHC
• Searching for BSM neutrino interactions in dark matter detectors
• On Light Resonance Interpretations of the B Decay Anomalies
• Low Scale $U(1{)}_X$ Gauge Symmetry as an Origin of Dark Matter, Neutrino Mass and Flavour Anomalies
• Neutrino scattering and B anomalies from hidden sector portals
• Probing $L_{\mu }-L_{\tau }$ models with CE$\nu$NS: A new look at the combined COHERENT CsI and Ar data
• Flavour anomalies and the muon $g-2$ from feebly interacting particles
• A Robust Description of Hadronic Decays in Light Vector Mediator Models
• Towards excluding a light $Z^{\prime }$ explanation of $b\to s{\ell }^{+}{\ell }^{-}$
• Flavour anomalies from a split dark sector
• Form factors of pion and kaon
• Dark $Z$ Implication for Flavor Physics
• A Mathematica Package for Calculation of One-Loop Penguins in FCNC Processes

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• Searching for new physics effects in future $W$ mass and ${\sin }^2{\theta }_W(Q^2)$ determinations
• The Muon Magnetic Moment and Physics Beyond the Standard Model
• Dark photon effect on the rare kaon decay $K_L\to {\pi }^0\nu \bar{\nu }$
• Assessing Lepton Flavor Universality Violations in Semileptonic Decays
• WIMP Dark Matter within the dark photon portal
• Shedding light on the MiniBoone Excess with Searches at the LHC
• Oblique corrections in general dark $U(1)$ models
• Constraints on the $U(1{)}_{B-L}$ model from global QCD analysis