Speaker
Description
The CMS collaboration at the Large Hadron Collider (LHC) searched for a charged Higgs boson, in the mass range of 300 to 700 GeV, decaying into a $W^\pm$ boson and a heavy neutral Higgs boson of mass 200 GeV, which successively decays into a pair of tau leptons, in proton-proton collisions at $\sqrt{s}=$ 13 TeV. In this paper, focussing on the Georgi-Machacek (GM) model, I discuss the parameter space, allowed by the theoretical and experimental constraints, for which the limits on this process obtained by the CMS can be accommodated. The GM model contains four neutral and six charged Higgs bosons. The study in this paper also shows that, for the choice of the parameters, the decay of the charged Higgs boson $H_3^{\pm}$ to $W^\pm$ and a heavy neutral Higgs boson $H$ is preferred over the decay to any gauge boson and any other neutral or charged Higgs bosons. The production process of $H$ is via $pp \r t b H_3^{\pm} \r t b W^{\pm} H$. The other decay channels $H\r b\bar{b}, c \bar{c}, W^+W^-, ZZ$ are also investigated at $\sqrt{s}=$ 13 and 100 TeV.
