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

TL;DR

This paper investigates how Higgs boson production and decay processes at electron-positron colliders can be used to probe the Left-Right twin Higgs model, considering recent experimental constraints and analyzing various production and decay channels.

Contribution

It provides a detailed analysis of Higgs processes at $e^{+}e^{-}$ colliders within the LRTH model, highlighting the potential of these processes to detect new physics effects.

Findings

LRTH effects significantly alter Higgs production and decay rates.

Higgs processes at colliders are sensitive probes of LRTH model parameters.

Heavy neutral boson $Z_H$ is excluded below 2.76 TeV by LHC data.

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 $e^{+}e^{-}\rightarrow ZH$, $e^{+}e^{-}\rightarrow \nu_{e}\bar{\nu_{e}}H$ and $e^{+}e^{-}\rightarrow e^{+}e^{-}H$, top quark Yukawa coupling production process $e^{+}e^{-}\rightarrow t\bar{t}H$, Higgs self-couplings production processes $e^{+}e^{-}\rightarrow ZHH$ and $e^{+}e^{-}\rightarrow \nu_{e}\bar{\nu_{e}}HH$ at $e^{+}e^{-}$ colliders. Besides, we study the major decay modes of the Higgs boson, namely $h\rightarrow f\bar{f}$($f=b,c,\tau$), $VV^{*}(V=W, Z)$, $gg$, $\gamma\gamma$. 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.