Doubly and singly charged Higgs pair production at high-energy e+e− linear colliders

Abstract

The Higgs triplet model predicts the existence of the doubly and singly charged Higgs bosons ([Formula: see text] and [Formula: see text]), whose decay modes are relevant to the vacuum expectation value of the triplet [Formula: see text] and the mass spectrum of these scalars. In this paper, we study the pair production of [Formula: see text] via the processes in [Formula: see text] collisions: [Formula: see text] and [Formula: see text]. The numerical results show that the production rates can reach the level of several fb with a center of energy at the TeV scale. The characteristic signals and relevant SM backgrounds are also discussed in both the degenerate and nondegenerate cases. In most of the parameter spaces, their possible signals might be detected via these processes in the future high-energy linear collider experiments with [Formula: see text] and [Formula: see text].