Experimentalists have long sought a method that allows them to control the branching ratios of an unstable particle decay and direct some decay to follow one specific desired channel without another. The powerful laser could make this a reality. In this letter and within the framework of the standard electroweak model, we investigate theoretically the laser effect on the branching ratios of different Z-boson decay modes by calculating analytically the Z-boson decay into a fermion–antifermion pai in the presence of a circularly polarized electromagnetic field. It is found that, at high intensities, the Z-boson could only decay invisibly into neutrinos, and its decay into any other pair of charged fermions becomes impossible due to the increase in the effective mass that fermions acquire inside the electromagnetic field. The influence of the laser frequency and intensity on the lifetime is also included in order to confirm the surprising result obtained for the pion lifetime in a previous paper (Mouslih 2020 Phys. Rev. D 102 073006).

长期以来，实验学家一直在寻找一种方法，该方法允许他们控制不稳定粒子衰变的分支比，并引导某些衰变遵循一个特定的所需通道而没有另一个通道。强大的激光可以使这成为现实。在这封信中，并且在标准电弱模型的框架内，我们通过分析计算在存在圆形的情况下的Z玻色子衰变成费米子-抗双峰的Pai ，从理论上研究了激光对不同Z玻色子衰变模式的分支比的影响。极化电磁场。发现在高强度下，Z-玻色子只能无形地衰减成中微子，并且由于电磁场内费米子获得的有效质量的增加，它不可能衰减成任何其他带电费米子对。还包括激光频率和强度对寿命的影响，以确认在先前的论文中获得的有关离子寿命的令人惊讶的结果（Mouslih 2020 Phys。Rev. D 102 073006）。