Probing the $Zb\bar{b}$ anomalous couplings via exclusive $Z$ boson decay

Hongxin Dong, Peng Sun, Bin Yan +1

We propose to utilize the exclusive $Z$-boson rare decays $Z\to {\rm Y}(ns)+\gamma$ to constrain the $Zb\bar{b}$ couplings at the HL-LHC and 100 TeV proton-proton collider. We demonstrate tha…