论文标题
$ cp $违反$τ$，$ t $和$ b $ dimension-dimension-6 Yukawa联轴器 - Baryogenesis，EDM和Higgs Physics的相互作用
$CP$ violation from $τ$, $t$ and $b$ dimension-6 Yukawa couplings -- interplay of baryogenesis, EDM and Higgs physics
论文作者
论文摘要
我们探讨了标准模型有效田间理论（SMEFT）的含义，其中涉及Higgs Boson和第三代费米昂领域的尺寸六个术语对Higgs玻色子产生的速率，并腐烂到Fermions，以及电子偶极力矩（EDMS），以及在电子的baryonsmmetry of Electron上。我们研究了分别为每种口味的这些额外术语以及两种口味的组合的后果。我们发现，复杂的$τ$ Yukawa耦合可以说明观察到的Baryon不对称$ Y_B^{\ rm obs} $在当前LHC和EDM范围内。复杂的$ b $（$ t $）Yukawa耦合可以占$ 4 \％$（$ 2 \％$）的$ y_b^{\ rm obs} $，而两者的组合可以达到$ 12 \％$。将$τ$与$ t $或$ b $结合在一起，分别在EDM和HIGGS生产时间衰减或HIGGS总宽度中扩大了可行的参数空间。有趣的是，在这种情况下，存在参数空间中的一个区域，其中SMEFT对电子EDM取消和对撞机信号强度的贡献精确地类似于SM，同时产生足够的Baryon不对称性。在这种情况下，测量$ CP $违反$τ$ leptons是$τ$ leptons。
We explore the implications of the Standard Model effective field theory (SMEFT) with dimension-six terms involving the Higgs boson and third-generation fermion fields on the rate of Higgs boson production and decay into fermions, on the electric dipole moments (EDMs) of the electron, and on the baryon asymmetry of the Universe. We study the consequences of allowing these additional terms for each flavor separately and for combinations of two flavors. We find that a complex $τ$ Yukawa coupling can account for the observed baryon asymmetry $Y_B^{\rm obs}$ within current LHC and EDM bounds. A complex $b$ ($t$) Yukawa coupling can account for $4\%$ ($2\%$) of $Y_B^{\rm obs}$, whereas a combination of the two can reach $12\%$. Combining $τ$ with either $t$ or $b$ enlarges the viable parameter space owing to cancellations in the EDM and in either Higgs production times decay or the total Higgs width, respectively. Interestingly, in such a scenario there exists a region in parameter space where the SMEFT contributions to the electron EDM cancel and collider signal strengths are precisely SM-like, while producing sufficient baryon asymmetry. Measuring $CP$ violation in Higgs decays to $τ$ leptons is the smoking gun for this scenario.
