τ BRANCHING FRACTIONS

• 来源期刊: 中国物理C（英文版）
• 年，卷（期）: 2016,（10）
• 页码范围: 640-644
• 页数: 5页
• 语种: 中文

摘要

In order to make optimal use of the experimental data to determine the τ branching fractions,their uncertainties,and their correlations,we perform a global minimum x2 fit using the measured values,their uncertainties,their statistical correlations,their dependencies on external parameters and common systematics,and the relations that hold between the branching fractions,including a unitarity constraint on the sum of all the exclusive τ decay branching fractions.Starting with this edition,we use a new fit procedure,which has been elaborated by the Tau Physics Group within the Heavy Flavour Averaging Group (HFAG) [1].