Speaker
Description
BESIII has taken 2.93, 7.33, and 4.5 $fb^{-1}$ of $e^+e^-$ collision data at energies of 3.773, 4.128-4.226, and 4.6-4.7 GeV, collecting the world largest dataset of of $D\bar{D}$, $D_sD_s$, and $\Lambda_c^+\Lambda_c^-$ pairs. On the subject of charmed meson, we will report the updated measurements of $|V_{cs}|$ in $D_s^+ \to \tau^+ \nu$ and the form factor studies in $D_s^+ \to K^+K^- e^+ \nu$ and $\pi^+\pi^- e^+ \nu$. In addition, we will report the amplitude analyses of Cabibbo-favored and -suppressed $D_s$ decays, including the observation of a new $a^0$-like state at 1.817 GeV, the branching fraction measurements of D mesons decay involving $K_L^0$, and the doubly Cabibbo-suppressed decay $D^0 \to K^+\pi^-\pi^0$. We will also report the improved measurement of the strong-phase difference in quantum-correlated DD decays. On the subject of charmed baryon, we will report the form factor measurement in $\Lambda_c^+ \to \Lambda e^+ \nu$, the observation of $\Lambda_c^+ \to p K^-e^+\nu$, and an improved measurement of $\Lambda_c^+ \to Xe^+\nu$. Moreover, we will report the amplitude analysis of $\Lambda_c^+ \to \Lambda \pi^+ \pi^0$ and the observations of Cabibbo-suppressed $\Lambda_c^+$ decays. Finally, we will present the prospect on measurements of charmed meson hadronic decays with the coming 20 $fb^{-1}$ of data data collected at 3.773 GeV by BESIII.
