标题： Bd系统中CP、T和CPT的间接破坏 显示英文标题

标题： Indirect Violation of CP, T and CPT in the Bd-system

摘要： 中性介子系统中离散对称性CP、T和CPT的间接破坏问题可以使用两个复数参数epsilon和delta来描述，这些参数在介子和夸克场的重相位变换下保持不变。 对于Bd系统，由于物理态之间的宽度差异可以忽略不计，只有Re(delta)和Im(epsilon)存在。 因此，为K介子构建的传统可观测量，基于味标签，对于该系统的类似研究没有用处。 我们描述如何使用CP标签并研究B介子的CP到味转换，从而构建替代K介子所用的不对称性，这些不对称性使我们能够测试Bd系统有效哈密顿量的T和CPT不变性。 显示英文摘要

摘要： The problem of indirect violation of discrete symmeties CP, T and CPT in a neutral meson system can be described using two complex parameters epsilon and delta, which are invariant under rephasing of meson and quark fields. For the Bd system, where the width difference between the physical states is negligible, only Re(delta) and Im(epsilon) survive. As a consequence, the traditional observables constructed for kaons, which are based on flavour tag, are not useful for the analogous study in this system. We describe how using a CP tag and studying CP-to-flavour transitions of the B mesons, we may build asymmetries, alternative to those used for the kaon, which enable us to test T and CPT invariances of the effective hamiltonian for the Bd system.