Searching for the heavy custodial fiveplet Higgs in the Georgi-Machacek model at the International Linear Collider

YuFei Zhang, Hao Sun, Xuan Luo +1

The Georgi-Machacek (GM) model is one of many Beyond Standard Model scenarios with an extended scalar sector which can group under the custodial $\mathrm{SU}(2{)}_{\mathrm{C}}$ symmetry into a fivep…