Search for neutralino pair production at sqrt(s) = 189 GeV
The DELPHI Collaboration, P. Abreu, et al
TL;DR
This paper reports a search for neutralino pairs at 189 GeV which found no evidence, thereby constraining the MSSM parameter space and production cross-sections.
Contribution
It provides experimental limits on neutralino pair production at LEP energies, refining the constraints on supersymmetric models.
Findings
No evidence for neutralino pair production at 189 GeV
Limits set on neutralino production cross-section
Exclusion of certain MSSM parameter regions
Abstract
A search for pair-production of neutralinos at a LEP centre-of-mass energy of 189 GeV gave no evidence for a signal. This limits the neutralino production cross-section and excludes regions in the parameter space of the Minimal Supersymmetric Standard Model (MSSM).
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