Production of doubly charged scalars from the decay of singly charged scalars in the Higgs Triplet Model

TL;DR

This paper explores how doubly charged Higgs bosons can be produced more effectively in the Higgs Triplet Model through decay chains involving singly charged scalars, enhancing detection prospects in collider experiments.

Contribution

It identifies a significant decay channel H^\pm o H^{\pm\pm} W^* in the Higgs Triplet Model, which can increase the production and detection of doubly charged Higgs bosons.

Findings

Large branching ratio for H^\pm o H^{\pm\pm} W^* in the model.

Comparable cross sections for pair production via decay and standard mechanisms.

Enhanced four-lepton detection channels for H^{\pm\pm}.

Abstract

The existence of doubly charged Higgs bosons (H^{\pm\pm}) is a distinctive feature of the Higgs Triplet Model (HTM), in which neutrinos obtain tree-level masses from the vacuum expectation value of a neutral scalar in a triplet representation of SU(2)_L. We point out that a large branching ratio for the decay of a singly charged Higgs boson to a doubly charged Higgs boson via H^\pm\to H^{\pm\pm}W^* is possible in a sizeable parameter space of the HTM. From the production mechanism q'qbar\to W^* \to H^{\pm\pm}H^\mp the above decay mode would give rise to pair production of H^{\pm\pm}, with a cross section which can be comparable to that of the standard pair-production mechanism qqbar\to \gamma^*,Z^* \to H^{++}H^{--}. We suggest that the presence of a sizeable branching ratio for H^\pm\to H^{\pm\pm}W^* could significantly enhance the detection prospects of H^{\pm\pm} in the four-lepton channel. Moreover, the decays H^0\to H^\pm W^* and A^0\to H^\pm W^* from production of the neutral triplet scalars H^0 and A^0 would also provide an additional source of H^\pm, which can subsequently decay to H^{\pm\pm}.