中国物理学会高能物理分会第十一届全国会员代表大会暨学术年会

BESIII has the world’s largest samples of J/ψ and ψ(3686) events from 𝑒+𝑒—annihilations, which offer an ideal and clean laboratory to study light meson spectroscopy , in particular for the search for QCD exotics. Recent important achievements in this field, including the observation of a 1-+ state, eta1(1855) in J/psi->gamma eta eta’, the observation of the X(2600) in J/psi->gamma eta’ pi+pi-,...

The newly reported $\eta_1(1855)$ with $J^{PC}=1^{-+}$ is interpreted to
be a dynamically generated pole in $f_1(1285)\eta-K_{1}(1400)\bar{K}$
scattering with Weinberg-Tomozawa term serves as interaction.
When $a_1-\pi$ mixing in axial meson dominance model is included,
the ratio in $\eta_1(1855)$ decaying into
final states $\eta \eta^{\prime}$ and $K^{\ast}\bar{K}\pi$ is...

The spectrum of mesons with mass less-than 2 GeV, especially those with strangeness, is poorly understood - both experimentally and theoretically. We address this issue by employing a novel method for constructing a kernel for the meson bound-state problem. The scheme produces a closed-form kernel that is symmetry-consistent (discrete and continuous) with the gap equation defined by any...

At BESIII, the R value is measured with a total of 14 data points with the corresponding c.m. energy going from 2.2324 to 3.6710 GeV. The statistical uncertainty of the measured R is less than 0.6%. Two different simulation models, the LUARLW and a new Hybrid generated, are used and give consistent detection efficiencies and initial-state-radiation corrections. An accuracy of better than 2.6%...

含时达利兹分析方法是研究D0-D0bar混合和CP破坏的重要研究手段。考虑Belle II计划

采集的50 ab-1数据的D0/D0bar样本大小，目前没有发表的模型依赖的含时达利兹程序包，我们

需要提高模型依赖的含时达利兹分析速度。根据Hydra分析框架，我们研发C++的含时达利兹分析

程序包DAFNE。根据Belle的953fb-1数据，采用达利兹分析方法研究D0->K- pi+ eta，通过

K pi/eta不变质量谱研究K*激发态。