论文标题
$μτ$基础上的瘦化生成
Leptogenesis in the $μτ$ basis
论文作者
论文摘要
我们在$μτ$基础上制定了三种型I瘦素生成，这很方便，因为在三种风味方案中，$ $ $ $和$τ$充电的Lepton Yukawa互动均以热平衡为单位，而热浴是在Exchange $ \ leftrightRightarrowτ$下进行的对称的。我们将这种形式主义应用于具有$μτ$ - 反射$ \ mathsf {cp}^{μτ} $对称的模型。我们证实了先前的结果，即通过精确的$ \ mathsf {cp}^{μτ} $对称的瘦肉制度失败。允许$ \ mathsf {cp}^{μτ} $对称性分为各个程度，我们表明，瘦素发生只能在某些调谐的参数空间中在三种味道方向上成功，这可以进一步暗示其他对称性。作为奖励，我们得出分析表达式，每当衰减的分支比率与$μ$，$τ$的口味相等或大约是如此。
We formulate three-flavor type-I leptogenesis in the $μτ$ basis which is convenient because in the three-flavor regime, both $μ$ and $τ$ charged lepton Yukawa interactions are in thermal equilibrium and the thermal bath is symmetric under the exchange $μ\leftrightarrow τ$. We apply this formalism to models with $μτ$-reflection $\mathsf{CP}^{μτ}$ symmetry. We confirm the previous result that leptogenesis fails in the three-flavor regime with exact $\mathsf{CP}^{μτ}$ symmetry. Allowing $\mathsf{CP}^{μτ}$ symmetry to be broken to various degrees, we show that leptogenesis can be successful in the three-flavor regime only in certain tuned parameter space, which could further imply additional symmetry is at play. As a bonus, we derive analytical expressions which could be utilized whenever the branching ratios for the decays to $μ$ and $τ$ flavors are equal or approximately so.
