Dark Matter Constraints on Gaugino/Higgsino Masses in Split Supersymmetry and Their Implications at Colliders

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dc.creatorWang, Fei
dc.creatorWang, Wenyu
dc.creatorYang, Jin Min
dc.date2005-12-11
dc.date2006-02-17
dc.date.accessioned2026-07-07T12:25:21Z
dc.date.available2026-07-07T12:25:21Z
dc.descriptionIn split supersymmetry, gauginos and Higgsinos are the only supersymmetric particles which are possibly accessible at foreseeable colliders. While the direct experimental searches, such as LEP and Tevatron experiments, gave robust lower bounds on the masses of these particles, the cosmic dark matter can give some upper bounds and thus have important implications for the searches at future colliders. In this work we scrutinize such dark matter constraints and show the allowed mass range for charginos and neutralinos (the mass eigenstates of gauginos and Higgsinos). We find that the lightest chargino must be lighter than about 1 TeV under the popular assumption M_1=M_2/2 and about 2 or 3 TeV in other cases. The corresponding production rates of the lightest chargino at the CERN Large Hadron Collider (LHC) and the International Linear Colldier (ILC) are also shown. While in some parts of the allowed region the chargino pair production rate can be larger than 1 pb at LHC and 100 fb at the ILC, other parts of the region correspond to very small production rates and thus there is no guarantee to find the charginos of split supersymmetry at future colliders.
dc.descriptionversion in EPJC (refs added)
dc.identifierhttps://arxiv.org/abs/hep-ph/0512133
dc.identifierhttp://arxiv.org/abs/hep-ph/0512133
dc.identifierEur.Phys.J.C46:521-526,2006
dc.identifierdoi:10.1140/epjc/s2006-02522-x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/214588
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDark Matter Constraints on Gaugino/Higgsino Masses in Split Supersymmetry and Their Implications at Colliders
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