Evidence at 3.6 sigma is reported for the semileptonic decays Lambda_c+ to Sigma^pm pi^mp e+ nu_e with branching fraction (7.7 +2.5 -2.3 stat +/- 1.3 syst) x 10^-4, consistent with quark-model predictions.
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First measurement of form factors r_A ≈ -0.112 and r_V ≈ -0.043 in D semileptonic decays to K1(1270) via amplitude analysis, plus improved branching fractions and upper limits on K1(1400) modes.
First observation of the Dalitz transition h_c → e⁺e⁻ η_c at 5.4σ significance with measured branching fraction ratio of 0.59% relative to the radiative decay h_c → γ η_c.
First absolute branching fraction measurements yield (3.81 ± 0.18stat ± 0.20syst)×10^{-4} for D0→γ K*0 and (2.51 ± 0.44stat ± 0.11syst)×10^{-5} for D0→γφ with 26.8σ and 7.9σ significance.
citing papers explorer
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Evidence for the semileptonic decays $\Lambda_c^{+} \to \Sigma^{\pm} \pi^{\mp} e^+ \nu_e$
Evidence at 3.6 sigma is reported for the semileptonic decays Lambda_c+ to Sigma^pm pi^mp e+ nu_e with branching fraction (7.7 +2.5 -2.3 stat +/- 1.3 syst) x 10^-4, consistent with quark-model predictions.
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First Measurement of the Decay Dynamics in the Semileptonic Transition of the $D^{+(0)}$ into the Axial-vector Meson $\bar K_1(1270)$
First measurement of form factors r_A ≈ -0.112 and r_V ≈ -0.043 in D semileptonic decays to K1(1270) via amplitude analysis, plus improved branching fractions and upper limits on K1(1400) modes.
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Observation of the Electromagnetic Dalitz Transition $h_c \rightarrow e^+e^-\eta_c$
First observation of the Dalitz transition h_c → e⁺e⁻ η_c at 5.4σ significance with measured branching fraction ratio of 0.59% relative to the radiative decay h_c → γ η_c.
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Measurements of the absolute branching fractions of $D^0\to\gamma \bar K^{*0}$ and $D^0\to\gamma \phi$
First absolute branching fraction measurements yield (3.81 ± 0.18stat ± 0.20syst)×10^{-4} for D0→γ K*0 and (2.51 ± 0.44stat ± 0.11syst)×10^{-5} for D0→γφ with 26.8σ and 7.9σ significance.