Search for neutralino pair production at $\sqrt{s}$ = 189 GeV

The DELPHI Collaboration P. Abreu; et al.

doi:doi:10.1007/s100520100615

EPJ

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2019 Impact factor 4.389

Particles and Fields

Eur. Phys. J. C 19, 201-212
DOI: 10.1007/s100520100615

Search for neutralino pair production at $\sqrt{s}$ = 189 GeV

The DELPHI Collaboration P. Abreu and et al.

LIP, IST, FCUL - Av. Elias Garcia, 14-1^o, 1000 Lisboa Codex, Portugal

(Received: 22 November 2000 / Revised version: 11 January 2001 / Published online: 15 March 2001 -© Springer-Verlag 2001)

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-sec tion and excludes regions in the parameter space of the Minimal Supersymmetric Standard Model (MSSM).