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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BESIII reports precision measurements of charm leptonic and semileptonic decays and lepton flavor universality tests with the largest near D D-bar threshold data sample.
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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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Experimental study for leptonic and semileptonic decays in the charm sector
BESIII reports precision measurements of charm leptonic and semileptonic decays and lepton flavor universality tests with the largest near D D-bar threshold data sample.