Neutral Higgs Boson Production at e+e- Colliders in the Complex MSSM: A Full One-Loop Analysis

TL;DR

This paper provides a comprehensive one-loop calculation of neutral Higgs boson production cross sections in the complex MSSM at e+e- colliders, crucial for future precision Higgs studies and searches.

Contribution

It presents the first full one-loop evaluation of Higgs production in the cMSSM, including all relevant channels and QED radiation effects, enhancing theoretical accuracy.

Findings

Sizable one-loop corrections of 10-20% to cross sections.

Corrections can reach up to 50% or more.

Results are vital for future linear collider analyses.

Abstract

For the search for additional Higgs bosons in the Minimal Supersymmetric Standard Model (MSSM) as well as for future precision analyses in the Higgs sector a precise knowledge of their production properties is mandatory. We evaluate the cross sections for the neutral Higgs boson production at e^+e^- colliders in the MSSM with complex parameters (cMSSM). The evaluation is based on a full one-loop calculation of the production channels e^+e^- -> h_i Z, h_i gamma, h_i h_j (i,j = 1,2,3), including soft and hard QED radiation. The dependence of the Higgs boson production cross sections on the relevant cMSSM parameters is analyzed numerically. We find sizable contributions to many cross sections. They are, depending on the production channel, roughly of 10-20% of the tree-level results, but can go up to 50% or higher. The full one-loop contributions are important for a future linear e^+e^- collider such as the ILC or CLIC. There are plans to implement the evaluation of the Higgs boson production cross sections into the code FeynHiggs.