Speaker
Description
The BESIII experiment has collected 20.3 $fb^{-1}$ and 7.33 $fb^{-1}$ of e+e- collision data at center-of-mass energies of 3.773 GeV and 4.128-4.226 GeV, respectively.
This presentation will provide an overview of recent studies using (semi)-leptonic D decays at BESIII. We will present the first experimental investigation of $D_s^{*+} \to l^+ \nu$ decays, along with improved measurements of the CKM matrix elements |Vcd| and |Vcs|, and the decay constants $f_{D_s^+}$ and $f_{D^+}$ via $D_s^+/D^+ \to \mu^+ \nu$ and $\tau^+ \nu$ decays. Furthermore, we will summarize the most precise results for the transition form factors in $D_{(s)} \to K, D \to \pi$, and $D_{(s)} \to \eta^{(')}$ decays. Complementing these leptonic studies, we will discuss progress in semileptonic analyses, including amplitude analyses and branching fraction measurements of $D_{(s)} \to hh l^+ \nu$ and $hhh l^+ \nu$ processes. These studies explore the hadron spectrum through scalar ($a_0, f_0, \sigma$), vector ($K^*, \phi$), and axial-vector ($K_1, b_1$) mesons, and will present experimental results for form factors in decays such as $D \to a_0(980)$, $D \to \sigma$, $D \to K^*$, $D_s \to f_0(980)$, and $Ds \to \phi$.
| Collaboration | BESIII |
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