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 precise knowledge of their production properties is mandatory. We evaluate the cross sections for the charged 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 mechanism e+e- -> H+H- and e+e- -> H^\pm W^\mp, 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 5-10% of the tree-level results, but can go up to 20% or higher. The full one-loop contributions are important for a future linear e+e- collider such as the ILC or CLIC.
Highlights
The identification of the underlying physics of the Higgs boson discovered at ∼125 GeV [1,2] and the exploration of the mechanism of electroweak symmetry breaking will clearly be a top priority in the future program of particle physics
The Higgs sector of the cMSSM is described at the tree level by two parameters: the mass of the charged Higgs boson, MH±, and the ratio of the two vacuum expectation values, tan β ≡ tβ = v2/v1
In this paper we present for the first time a full and consistent one-loop calculation for charged cMSSM Higgs boson production at e+e− colliders in association with a W boson or a second charged Higgs boson
Summary
The identification of the underlying physics of the Higgs boson discovered at ∼125 GeV [1,2] and the exploration of the mechanism of electroweak symmetry breaking will clearly be a top priority in the future program of particle physics. Decays to (lighter) Higgs bosons have been evaluated at the full one-loop level in the cMSSM in Ref. Corrections at and beyond the one-loop level in the MSSM with real parameters (rMSSM) are implemented into the code HDECAY [52– 54] Both codes were combined by the LHC Higgs Cross Section Working Group to obtain the most precise evaluation for rMSSM Higgs boson decays to SM particles and decays to lighter Higgs bosons [55]. A full one-loop calculation in the cMSSM of all neutral Higgs boson production channels with two final state particles, e+e− → hi Z , hi γ , hi h j (i, j = 1, 2, 3) has recently been presented in Ref.
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