Precise Predictions for Higgs Production in Neutralino Decays

TL;DR

This paper provides precise theoretical predictions for neutralino decays into Higgs bosons in the MSSM, including higher-order corrections, and explores the potential to detect light Higgs bosons in specific parameter regions.

Contribution

It presents complete one-loop and two-loop corrections for neutralino decay processes in the MSSM with CP violation, enhancing prediction accuracy.

Findings

The decay chi^0_2->chi^0_1 h_1 could be a promising channel to detect light Higgs bosons.

Analysis of the CPX scenario shows regions where a very light Higgs remains unexcluded.

Higher-order corrections significantly impact decay rate predictions.

Abstract

Complete one-loop results, supplemented by two-loop Higgs propagator-type corrections, are obtained for the class of processes chi^0_i->chi^0_j h_a in the MSSM with CP-violating phases for parameters entering the process beyond lowest order. The parameter region of the CPX benchmark scenario where a very light Higgs boson is unexcluded by present data is analysed in detail. We find that the decay chi^0_2->chi^0_1 h_1 may offer good prospects to detect such a light Higgs boson.