Rare charm hadron decays offer clean null tests of the standard model that can reach branching ratios up to 10^{-3} for dark photons and 10^{-4} for ALPs in unconstrained parameter spaces.
Seeking massless dark photons in the decays of charmed hadrons
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Modified pQCD with transverse momenta and Sudakov suppression yields form factors for B→ρ(ω)γ that match LCSR after fitting soft components to data, then bounds B→ρ(ω)γ' branching ratios for a dark photon.
The paper surveys theoretical motivations, experimental searches, and bounds on the dark photon as a kinetically mixed gauge boson from a dark sector, covering both massive and massless cases along with related milli-charged fermion constraints.
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Probing invisible particles with charm
Rare charm hadron decays offer clean null tests of the standard model that can reach branching ratios up to 10^{-3} for dark photons and 10^{-4} for ALPs in unconstrained parameter spaces.
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Branching ratios and CP violations of $B \to\rho (\omega) \gamma$ decays in the modified perturbative QCD approach and the relevant dark photonic decays of $B\to \rho (\omega) \gamma^\prime $
Modified pQCD with transverse momenta and Sudakov suppression yields form factors for B→ρ(ω)γ that match LCSR after fitting soft components to data, then bounds B→ρ(ω)γ' branching ratios for a dark photon.
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The Dark Photon
The paper surveys theoretical motivations, experimental searches, and bounds on the dark photon as a kinetically mixed gauge boson from a dark sector, covering both massive and massless cases along with related milli-charged fermion constraints.
- Searching for dark photons in $J/\psi$ decays