R(D ∗)| V cb |和形状因子之间的重夸克对称关系
B(∗)→D(∗)形状因数之间存在严格的关系,存在于重夸克极限中,并且已知超前对称破坏校正。 我们重新考虑了它们的不确定性,以及在具有模型独立参数的B→D(∗)ℓν的最近Belle数据分析中以及在R(D(∗))的相关预测中的作用。 我们发现| V cb | = 41.5(1.3)10−3和| V cb | = 40.6(-1.3+ 1.2)10-3,使用光锥和规则的输入,R(D ∗)= 0.260(8)。
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