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. These constitute the world's largest samples of $D$ anti-$D$ and $D_s$ anti-$D_s$ pairs, respectively, providing a unique laboratory to probe the non-perturbative dynamics of Quantum Chromodynamics (QCD) in the charm sector.
We will present the measurement of branching fractions of fifteen $D_s^+$ hadronic decays using a global fit. Furthermore, we report recent advancements in amplitude analyses of $D \to \pi \pi \eta$, $D^+ \to \pi^+ \pi^0pi^0/\eta\eta$, $D^0 \to K_S \pi^0 \pi^0$ as well as $D_s^+ \to K_SK_L\pi^+$, $D_s^+ \to \pi^+\pi^+\pi^-\pi^0 (\pi^0)$. These analyses allow for detailed investigations of intermediate processes involving scalar mesons and the polarization properties of D to vector-vector decays. We also observe deviations in the branching fractions of phi-meson decays from the Particle Data Group (PDG) world averages, as well as anomalously large branching fractions for decays dominated by W-annihilation topologies.
| Tracks | Charm hadrons |
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