CERN Accelerating science

Article
Report number	hep-ph/0502036 ; CERN-PH-TH-2005-014 ; DCPT-2004-114 ; IPPP-2004-57 ; TSL-ISV-2005-0287
Title	Distinguishing between MSSM and NMSSM by combined LHC and ILC analyses
Author(s)	Moortgat-Pick, G ; Hesselbach, S ; Franke, F ; Fraas, H
Affiliation	(CERN)
Publication	2005
Imprint	3 Feb 2005
Number of pages	12
In:	JHEP 06 (2005) 048
DOI	10.1088/1126-6708/2005/06/048
Subject category	Particle Physics - Phenomenology
Accelerator/Facility, Experiment	ILC CERN LHC
Abstract	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 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, followed by subsequent observation and identification at the LHC, may solve the problem. In our numerical example we include errors in the mass measurements and use standard methods of supersymmetric parameter determination.

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