Measuring the trilinear neutral Higgs boson couplings in the MSSM at $e^+ e^-$ colliders

TL;DR

This paper investigates the potential to measure the trilinear couplings of neutral Higgs bosons in the MSSM at future high-energy $e^+ e^-$ colliders, considering experimental constraints from the LHC discovery.

Contribution

It analyzes the MSSM parameter space to identify regions where neutral Higgs trilinear couplings can be experimentally measured at future colliders, incorporating recent LHC constraints.

Findings

Feasible measurement regions identified in MSSM parameter space.

Measurement prospects depend on specific Higgs production processes.

Constraints from LHC Higgs discovery significantly influence measurement feasibility.

Abstract

We consider the measurement of the trilinear couplings of the neutral Higgs bosons~($H^0, h^0$) in the minimal supersymmetric standard model~(MSSM) at a high energy $e^+$ $e^-$ linear collider in the light of the discovery of a Higgs boson at the CERN Large Hadron Collider~(LHC). We identify the state observed at the LHC with the lightest CP-even Higgs boson of the MSSM. We implement this constraint, as well as all the other relevant experimental constraints, on the parameter space of the MSSM in order to study the feasibility of measuring the trilinear couplings of the neutral Higgs bosons. For the measurement of trilinear couplings, we consider the multiple Higgs production processes. We delineate the regions of MSSM parameter space where the trilinear couplings of the neutral Higgs bosons could be measured at a high energy electron-positron collider.