Construction Of CP-Violating Effective Lagrangian For Tau Lepton

People all thought that C, P and T play a fundamental role in nature conservationrespectively. But in the1950s, after Tsung-Dao Lee and Chen-Ning Yang in-depth studyedthe mystery of θ-ι, we overthrow this ingrained idea. The experimental group which CS Wuleads and Garwin and Friedman confirmed this point of view too. In1964, Croin and Fitchfound the phenomenon of CP-Violation, this made people have a new understanding of weakinteraction. CP-Violation has two styles: phenomenon of direct CP Violation; phenomenon ofindirect CP Violation. Indirect CP Violation is caused by different CP mixed state. Direct CPViolation is different from indirect CP Violation, because it is often described by ε/ε,where is the parameter which describes direct CP Violation.Effective Lagrangian is made up by all feasible operators which satisfy the symmetry,because it contains many numbers, we can use1/Λ to spead out it, where Λ is the energyscale of new physics. Because the energy scale of new physics is much larger than theelectroweak scale, we can describe new physics effects in low energy by the effectiveLagrangian.So in this paper, we make use of the effective Lagrangian approach to constructCP-violating of Effective Lagrangian for tau lepton. First of all, we construct CP-oddconsiderable which is associated with this process, and then we give the construction ofCP-violating Effective Lagrangian for dimension-6. Because all experiments conform thegauge symmetry of SU (2) L×U(1)Y, it requires Lagrangian which must satisfy this symmetry,and when we study dimension-6for CP-violation SU (2) L×U(1)Yinvariant operators, itinvolves the tau lepton, so it offers the possibility to construct CP-violating EffectiveLagrangian for tau lepton.