Distinguishing between MSSM and NMSSM by combined LHC and ILC analyses

Details Distinguishing between MSSM and NMSSM by combined LHC and ILC analyses Distinguishing between MSSM and NMSSM by combined LHC and ILC analyses

2005-02-03

arxiv.org/abs/hep-ph/0502036v2

JHEP 0506 (2005) 048

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, LaTeX, 1 figure; v2: discussion of Higgs sector and references added, published version

Scientific paper

10.1088/1126-6708/2005/06/048

We show that the interplay between the LHC and the e^+ e^- International Linear Collider (ILC) with sqrt{s}=500 GeV might be crucial for the discrimination between the minimal and next-to-minimal supersymmetric standard model. We present an NMSSM scenario that cannot be distinguished from the MSSM by cross sections and mass measurements if only the light neutralinos and the lightest chargino are kinematically accessible, even if one of the neutralinos has a significant singlino component. Mass predictions for the heavier neutralinos from the ILC analysis and their observation at the LHC lead to an identification of the neutralino mixing character and the underlying supersymmetric model in a combined LHC/ILC analysis. In our numerical example we include errors in the mass measurements and use standard methods of supersymmetric parameter determination.

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