Speaker
Description
BESIII has collected 7.93, 7.33, and 4.5 fb$^{-1}$ of e$^+$e$^-$ collision data samples at 3.773, 4.128-4.226, and 4.6-4.7 GeV, which provide the largest dataset of charmed hadron pairs in the world, respectively, and present a unique opportunity to investigate charm decays.
For the hadronic decays, we will present the observation of $D^+$ to $K_s$ $a_0(980)+$ and D to $a_0(980)^+$$\pi$, and the determination of U-spin breaking parameters of the decay $D^0$ to $K_L$ $\pi^+$ $\pi^-$, and recent progress on amplitude analyses, including $D_s^+\rightarrow\pi^+\pi^+\pi^-\pi^0$, $\Lambda_c^+$ to $\Lambda \pi^+ \pi^0$, and $\Lambda_c^+$ to $\Lambda \pi^+ \eta$, along with the measurement of branching fractions of fifteen $D_s^+$ hadronic decays using a global fit. Futhermore, our talk will also includes the branching fraction measurements of the singly and doubly Cabibbo-suppressed decays of charmed hadrons and the measurement of the decay asymmetry in the $\Lambda_c^+$ decays.
For the (semi-)leptonic decays, we will present the first experimental study of $D_{(s)}^{*+}$ to $l^+$ $\nu$ and the inclusive $\Lambda_c\rightarrow X e\nu$ decays, and the improved measurements of $|V_{cs}|$ and $D_s$ decay constant in $D_s^+\rightarrow \mu^+ \nu$ and $\tau^+ \nu$. Finally, we will summarize the form factor studies in the decays of $D_s$ to $\eta^{(\prime)}$, $D_s$ to $f_0(980)$, $D_s$ to $\phi$, and $D$ to $f_0(500)$, $D$ to $K^*$.
