Search for charginos with a small mass difference to the lightest supersymmetric particle at = 189 GeV

2000/02/15 by L3 Collaboration, M. Acciarri, P. Achard +98 · 3 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #hep-ex

paper · pdf · doi:10.1016/s0370-2693(00)00488-3

published as Phys.Lett.B482:31-42,2000

arxiv created 2000/02/15 · openalex publication_date 2000/06/01 · arxiv updated 2012/08/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04

Abstract

A search for charginos nearly mass-degenerate with the lightest supersymmetric particle is performed using the 176 pb^-1 of data collected at 189 GeV in 1998 with the L3 detector. Mass differences between the chargino and the lightest supersymmetric particle below 4 GeV are considered. The presence of a high transverse momentum photon is required to single out the signal from the photon-photon interaction background. No evidence for charginos is found and upper limits on the cross section for chargino pair production are set. For the first time, in the case of heavy scalar leptons, chargino mass limits are obtained for any χ^+-₁ - χ⁰₁ mass difference.

Citations

• Review of Particle Physics

Cited by

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