The hadronic decays of charmed mesons at BESIII

Thursday 30 Apr 2026, 10:00 → 12:00 Asia/Shanghai

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#腾讯会议：702-611-959

报告摘要：

The BESIII experiment has collected $20.3 fb^(-1)$ of $e^+ e^-$  collision data at $\sqrt(s)=3.773 GeV$ and $7.33 fb^(-1)$  at center-of-mass energies from 4.128 to 4.226 GeV. These constitute the world's largest samples of $D\bar{D}$  and $D_s \bar{D_s}$ pairs, respectively, providing a unique laboratory to probe non-perturbative Quantum Chromodynamics  in the charm sector.

I will present recent measurements of hadronic decays of charmed mesons at BESIII, including branching fractions of fifteen $D_s^+$ decay modes determined from a global fit, as well as amplitude analyses of $D→ππη$, $D^+→π^+ π^0 π^0$, $D^+→π^+ ηη$, $D^+→πππη$,  $D^0→ K_S π^0 π^0$, $D_s^+  → K_S  K_L  π^+$, and $D_s^+→π^+ π^+  π^-  π^0  (π^0  )$. These analyses enable detailed investigations of intermediate processes involving scalar mesons and the polarization properties of  D→ VV decays. BESIII also observe deviations in the branching fractions of ϕ-meson decays from the Particle Data Group (PDG) world averages, as well as anomalously large branching fractions for decays involving scalar particles and W-annihilation topologies.

报告人简介：柯百谦，郑州大学，河南省特聘教授。2017年获美国卡内基·梅隆大学博士学位，后于 从事博士后研究。现任北京谱仪（BESIII）粲物理组共同召集人、BESIII成员委员会（IB）成员、国际重味物理平均组（HFLAV）粲衰变召集人，并担任《中国物理C》期刊编委。主要研究方向为BESIII实验上的粲物理与粲偶素物理，包括粲强子衰变的精确检验、多体振幅分析、半轻衰变及蒙特卡罗产生子等。获2024年河南省杰出青年科学基金，曾入选中国科学院台湾青年访问学者计划，和美国费米实验室John Peoples青年研究学术奖金。