论文标题
CDF W-MAS测量的深色光子动力学混合效应
Dark photon kinetic mixing effects for the CDF W-mass measurement
论文作者
论文摘要
一个新的$ u（1）_x $ gauge boson $ x $主要与黑暗扇区相互作用，可以与标准型号（SM）$ u（1）_y $ $ gauge boson $ y $ y $进行可恢复的动力学混合。此混合除了引入了深色光子和深色扇区与SM颗粒的相互作用外，它还修饰了SM颗粒之间的相互作用。修改后的交互可以施放到斜$ s $，$ t $和$ u $参数中。我们发现，由于深色光子质量大于$ z $玻色子质量，与理论预测相比，CDF最近报告的W Mass多余问题的张力从最近报告的W质量过剩问题的张力从$7σ$偏差降低到$3σ$。如果在$ u（1）_x $和$ su（2）_l $ gauge Bosons之间存在非亚洲动力学混合，则需要使用此类型A的简单可重新分解模型，即可产生三胞胎higgs来产生混合。我们发现，这个具有真空期望值的三胞胎5 GEV自然可以解释质量过量。
A new $U(1)_X$ gauge boson $X$ primarily interacting with a dark sector can have renormalizable kinetic mixing with the standard model (SM) $U(1)_Y$ gauge boson $Y$. This mixing besides introduces interactions of dark photon and dark sector with SM particles, it also modifies interactions among SM particles. The modified interactions can be casted into the oblique $S$, $T$ and $U$ parameters. We find that with the dark photon mass larger than the $Z$ boson mass, the kinetic mixing effects can reduce the tension of the W mass excess problem reported recently by CDF from $7σ$ deviation to within $3 σ$ compared with theory prediction. If there is non-abelian kinetic mixing between $U(1)_X$ and $SU(2)_L$ gauge bosons, in simple renormalizable models of this type a triplet Higgs is required to generate the mixing. We find that this triplet with a vacuum expectation value of order 5 GeV can naturally explain the W mass excess.
