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Semileptonic $D_{(s)}$-meson decays in the light of recent data
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abstract
Inspired by recent improved measurements of charm semileptonic decays at BESIII, we study a large set of $D(D_s)$-meson semileptonic decays where the hadron in the final state is one of $D^0$, $\rho$, $\omega$, $\eta^{(\prime)}$ in the case of $D^+$ decays, and $D^0$, $\phi$, $K^0$, $K^\ast(892)^0$, $\eta^{(\prime)}$ in the case of $D^+_s$ decays. The required hadronic form factors are computed in the full kinematical range of momentum transfer by employing the covariant confined quark model developed by us. A detailed comparison of the form factors with those from other approaches is provided. We calculate the decay branching fractions and their ratios, which show good agreement with available experimental data. We also give predictions for the forward-backward asymmetry and the longitudinal and transverse polarizations of the charged lepton in the final state.
Forward citations
Cited by 4 Pith papers
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Non-perturbaitve effects for the isoscalar light vector $\omega$-meson in charmed meson semileptonic decays
With a new harmonic-oscillator model for the omega's transverse light-cone distribution amplitude, QCD light-cone sum rules reproduce the measured D+→ωℓν branching fractions and predict angular observables.
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Investigation of $\Lambda_c \to (\Lambda,n)\ell^+ \nu_\ell $ Decays in Standard Model and Beyond
A model-independent analysis of Lambda_c to (Lambda, neutron) l nu decays finds SM rates about 10 percent above experiment and proposes the muon-to-electron forward-backward asymmetry ratio as a robust new physics probe.
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Vector mesons leading-twist longitudinal distribution amplitudes and related semi-leptonic decays within QCD sum rules
New QCD sum-rule calculation gives ξ-moments up to tenth order and PLP-model distribution amplitudes for ρ, K*, φ, which are then used to recalculate D_(s)→V semileptonic observables.
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Scrutinizing lepton flavor universality and transition form factor correlation from charmed meson semileptonic decay into light strange vector $K^*$ meson
A light-cone sum-rule calculation predicts D_s^+→K^{*0} form factors and a muon/electron branching ratio R=0.950, consistent with the Standard Model.
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