【摘 要】
：
利用北京谱仪(BES-Ⅰ)在北京正负电子对撞机(BEPC)e+e-质心系能量为4.03GeV处采集的积分亮度为22.3pb-1的数据,研究了D0→K0sπ+π-,D0→K0sK+K-的衰变及其末态的共振结构.
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利用北京谱仪(BES-Ⅰ)在北京正负电子对撞机(BEPC)e+e-质心系能量为4.03GeV处采集的积分亮度为22.3pb-1的数据,研究了D0→K0sπ+π-,D0→K0sK+K-的衰变及其末态的共振结构. 实验测得D0→K0sπ+π-过程的分支比为(5.32±0.53±0.40)%;D0→K·-π+,D0→(K-)0ρ0和D0→(K-)0s(π+π-)non-resonance过程的分支比分别为(6.05±0.32±0.49)%, (1.17±0.17±0.13)%和(1.35±0.22±0.17)%;测得D0→K0sK+K-,D0→(K-)0φ和D0→(K-)0(K+K-)non-φ的分支比分别为(1.04±0.24±0.16)%, (1.12±0.34±0.15)%和(0.27±0.13±0.03)%.
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