Speaker
Description
BESIII has collected 20.3 and 7.33 $fb^{-1}$ of e+e- collision data samples at 3.773 and 4.128-4.226 GeV, which provide the largest dataset of $D\bar{D}$ and $D_sD_s$ pairs in the world, respectively.
We will present the measurement of branching fractions of fifteen $D_s$ hadronic decays using a global fit and highlight our recent advancements in amplitude analyses of $D^+ \to K_s \pi^+ \eta$, $D \to \pi \pi \eta$, $D_s^+ \to \pi^+ \pi^+ \pi^- \pi^0$, and $D_s^+ \to \pi^+ \pi^+ \pi^-\pi^0 \pi^0$. In these amplitude analyses, we observe the $D^+ \to K_s a_0(980)^+$, $D \to a_0(980) \pi$, and $D_s^+ \to \omega \rho^+$ decays, along with deviations in the branching fractions of $\phi$ decays from the PDG average.
As for the (semi)-leptonic decays, we will present the first experimental study of $D_{(s)}^{*+} \to l+ \nu$ and the improved measurements of |Vcd|, |Vcs|, $D_s^+/D^+$ decay constant in $D_s^+/D^+ \to \mu^+ \nu$ and $\tau^+ \nu$. Furthermore, we will provide a comprehensive overview of the most precise experimental results for $D_{(s)} \to K$, $D \to \pi$, and $D_s \to \eta^{(‘)}$ transition form factors. We have also investigated scalar ($a_0$, $f_0$, $\sigma$), vector ($K^*$, $\phi$), axial vector ($K_1$, $b_1$) particles on the hadron spectrum of $D_{(s)}\to hh l^+ \nu$ and $hhh l^+ \nu$. The experimental studies of $D \to a_0(980)$, $D \to \sigma$, $D \to K^*$, $D_s \to f_0(980)$, and $D_s \to \phi$ form factors will also be presented.
Details
N/A
| Internet talk | No |
|---|---|
| Is this an abstract from experimental collaboration? | Yes |
| Name of experiment and experimental site | BESIII, IHEP, Beijing, China |
| Is the speaker for that presentation defined? | No |