Higgs boson production and decay at $e^{+}{e}^{-}$ colliders as a probe of the Left-Right twin Higgs model

Abstract

In the framework of the Left-Right twin Higgs (LRTH) model, we consider the constrains from the latest search for high-mass dilepton resonances at the LHC and find that the heavy neutral boson $Z_H$ is excluded with mass below 2.76 TeV. Under these constrains, we study the Higgs-Gauge coupling production processes $e^{+}{e}^{-}\to ZH$, $e^{+}{e}^{-}\to \hat{I}{½}_e\overline{\hat{I}{½}_e}H$ and $e^{+}{e}^{-}\to e^{+}{e}^{-}H$, top quark Yukawa coupling production process $e^{+}{e}^{-}\to t\bar{t}H$, Higgs self-couplings production processes $e^{+}{e}^{-}\to ZHH$ and $e^{+}{e}^{-}\to \hat{I}{½}_e\overline{\hat{I}{½}_e}HH$ at $e^{+}{e}^{-}$ colliders. Besides, we study the major decay modes of the Higgs boson, namely $h\to f\bar{f}$($f=b,c,\ddot{I}„$), $V{V}^{\ast }(V=W,Z)$, $gg$, ${\hat{I}}^3{\hat{I}}^3$. We find that the LRTH effects are sizable so that the Higgs boson processes at $e^{+}{e}^{-}$ collider can be a sensitive probe for the LRTH model.

Final version to appear in Nucl.Phys.B