The hadronic decays of charmed mesons at BESIII

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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 $7.33fb^(-1)$at center-of-mass energies from4.128to4.226 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$D→ππη$,$D^+→π^+π^0π^0$, $D^+→π^+ηη$, $D^+→πππη$, $D^0→K_Sπ^0π^0$, $D_s^+→ K_S K_Lπ^+$,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 ofD→ VVdecays. BESIII also observe deviations in the branching fractions ofϕ-meson decays from the Particle Data Group (PDG) world averages, as well as anomalously large branching fractions for decays involving scalar particles andW-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。