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Search for Charginos with a Small Mass Difference with the Lightest Supersymmetric Particle at \sqrt{s} = 189 GeV

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arxiv hep-ex/0002043 v1 pith:WVY4XZTN submitted 2000-02-15 hep-ex

classification hep-ex
keywords masscharginocharginoslightestparticlesupersymmetricdifferencelimits
verification ladder T0 review T1 audit T2 compute T3 formal
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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 \tilde{\chi}^{+-}_1 - \tilde{\chi}^0_1 mass difference.

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  1. Collider signatures of fermionic scotogenic dark matter

    hep-ph 2025-02 conditional novelty 5.0 of 10

    LHC searches can probe fermionic scotogenic dark matter in the singlet-triplet model, complementing charged lepton flavor violation and relic density constraints.

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