分类: 物理学 >> 核物理学 提交时间: 2016-09-12
摘要: We report a measurement of the amplitude ratio rS of B0→D0K∗0 and B0→D0¯K∗0 decays with a Dalitz analysis of D→K0Sπ+π− decays, for the first time using a model-independent method. We set an upper limit rS<0.87 at the 68\% confidence level, using the full data sample of 772×106 BB¯ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB e+e− collider. This result is obtained from observables x−=+0.4+1.0+0.0−0.6−0.1±0.0, y−=−0.6+0.8+0.1−1.0−0.0±0.1, x+=+0.1+0.7+0.0−0.4−0.1±0.1 and y+=+0.3+0.5+0.0−0.8−0.1±0.1, where x±=rScos(δS±ϕ3), y±=rSsin(δS±ϕ3) and ϕ3 (δS) is the weak (strong) phase difference between B0→D0K∗0 and B0→D0¯K∗0.