论文标题
使用$ z $ boson二极管在$ zz $ pallization中探测$ zt \ bar {t} $耦合在$ zz $生产中
Probing $Zt\bar{t}$ couplings using $Z$ boson polarization in $ZZ$ production at hadron colliders
论文作者
论文摘要
我们建议通过Gluon-Gluon融合过程$ gg \ to zz $利用$ zz $生产中$ z $玻色子的两极分化信息，以探测$ zt \ bar {t} $ gauge耦合。纵向两极化的$ z $玻色子的贡献对$ zt \ bar {t} $耦合的轴向矢量组件（$ a_t $）敏感。我们证明，从$ z $ boson衰减中充电的Lepton的角度分布非常适合测量$ z $玻色子的两极分化和$ a_t $的确定。我们表明，$ zz $生产是通过$ gg \ to zz $进程补充到$ zt \ bar {t} $和$ tzj $生产，用于测量Hadron Colliders的$ ZT \ bar {t} $耦合。
We propose to utilize the polarization information of the $Z$ bosons in $ZZ$ production, via the gluon-gluon fusion process $gg\to ZZ$, to probe the $Zt\bar{t}$ gauge coupling. The contribution of longitudinally polarized $Z$ bosons is sensitive to the axial-vector component ($a_t$) of the $Zt\bar{t}$ coupling. We demonstrate that the angular distribution of the charged lepton from $Z$ boson decays serves well for measuring the polarization of $Z$ bosons and the determination of $a_t$. We show that $ZZ$ production via the $gg\to ZZ$ process complement to $Zt\bar{t}$ and $tZj$ productions in measuring the $Zt\bar{t}$ coupling at hadron colliders.
