Branching fractions of semileptonic $D$ and $D_s$ decays from the covariant light-front quark model

Abstract

Based on the predictions of the relevant form factors from the covariant light-front quark model, we show the branching fractions for the $D(D_s)\to (P,S,V,A)\ell {\nu }_{\ell }$ ($\ell =e$ or $\mu$) decays, where $P$ denotes the pseudoscalar meson, $S$ the scalar meson with a mass above 1 GeV, $V$ the vector meson and $A$ the axial-vector one. Comparison with the available experimental results are made, and we find an excellent agreement. The predictions for other decay modes can be tested in a charm factory, e.g., the BESIII detector. The future measurements will definitely further enrich our knowledge on the hadronic transition form factor as well as the inner structure of the even-parity mesons ($S$ and $A$).

Predictions on D-> K1(1270), K1(1400) l nu rates corrected

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