BESIII上D介子的(半)轻子衰变

Youhua Yang
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引用次数: 1

摘要

基于质心能量为$\sqrt{s} = 3.773$和4.180~GeV的2.93 fb$^{-1}$和3.19 fb$^{-1}$的数据,BESIII上的轻子和半轻子$D$衰变贡献了世界上最精确的实验测量值$|V_{cs(D)}}$和形状因子$f_{D_{(s)}}$。在粲强子$D_{(s)}$质量阈值处的最大样本也为首次提取某些半电子衰变的形状因子提供了机会,并与半介子衰变一起,我们可以更好地理解轻子风味的普适性。
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(Semi-)leptonic decays of D Mesons at BESIII
Leptonic and semi-leptonic $D$ decays at BESIII contribute the most precise experimental measurement of $|V_{cs(d)}|$ and form factor $f_{D_{(s)}}$ in the world based on 2.93 fb$^{-1}$ and 3.19 fb$^{-1}$ data taken at center-of-mass energies $\sqrt{s} = 3.773$ and 4.180~GeV, respectively. The largest samples at the mass threshold of the charmed hardons $D_{(s)}$ also provide chances to extract form factors of some semi-electronic decays for the first time and together with the semi-muonic decays we could understand lepton flavour universality better.
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