论文标题
SMEFT中Yukawa跑步的侵犯风味的影响
Flavour Violating Effects of Yukawa Running in SMEFT
论文作者
论文摘要
我们在标准模型有效理论（SMEFT）的背景下研究Yukawa重态化组（RG）跑步效果。Yukawa的运行是风味依赖性的导致RG诱导的非对角线条目，因此最初必须在diagonal Yukonal Yukawa矩阵上进行高尺度的Yukawa矩阵，在Electroweak（eew）（EW）尺度上进行重复。执行这种风味旋转会导致违反风味的操作员，这与通过SMEFT RG演化获得的风味不同。我们表明，这些风味旋转可能会对低能现象学产生很大的影响。为了证明这种效果，我们在数值上和分析上比较了两种违反风味的来源，并研究了它们对几个下型风味过渡示例的影响。为此，我们考虑$ b_s- \ bar b_s $混合，$ b \ tosγ$，$ b \ to s \ ell \ ell \ ell \ el $以及electroweak precision observables。我们表明，旋转效应可以比Wilson系数的纯RGE演变贡献相当甚至更大。
We study Yukawa Renormalization Group (RG) running effects in the context of the Standard Model Effective Theory (SMEFT).The Yukawa running being flavour dependent leads to RG-induced off-diagonal entries, so that initially diagonal Yukawa matrices at the high scale have to be rediagonalized at the electroweak (EW) scale. Performing such flavour rotations can lead to flavour violating operators which differ from the ones obtained through SMEFT RG evolution. We show, that these flavour rotations can have a large impact on low-energy phenomenology. In order to demonstrate this effect, we compare the two sources of flavour violation numerically as well as analytically and study their influence on several examples of down-type flavour transitions. For this purpose we consider $B_s-\bar B_s$ mixing, $b\to sγ$, $b\to s \ell \ell$ as well as electroweak precision observables. We show that the rotation effect can be comparable or even larger than the contribution from pure RGE evolution of the Wilson coefficients.
