6533b851fe1ef96bd12a9f43
RESEARCH PRODUCT
Search for charginos in e(+)e(-) interactions at root s=189 GeV
Delphi CollaborationReyes Alemany FernándezSusana Cabrera UrbánMaría Victoria Castillo GiménezEduardo Cortina GilMaría José Costa MezquitaAntonio Ferrer SoriaJuan A. Fuster VerdúCarmen García GarcíaInés Gil BotellaJuan José Hernández ReyEmilio Higón RodríguezFernando Martínez VidalArantza Oyanguren CamposJosé Salt CairolsPablo Tortosa Martínezsubject
Física nuclearPartícules (Física nuclear)description
An update of the searches for charginos and gravitinos is presented, based on a data sample corresponding to the 158 pb^{-1} recorded by the DELPHI detector in 1998, at a centre-of-mass energy of 189 GeV. No evidence for a signal was found. The lower mass limits are 4-5 GeV/c^2 higher than those obtained at a centre-of-mass energy of 183 GeV. The (\mu,M_2) MSSM domain excluded by combining the chargino searches with neutralino searches at the Z resonance implies a limit on the mass of the lightest neutralino which, for a heavy sneutrino, is constrained to be above 31.0 GeV/c^2 for tan(beta) \geq 1.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-01-01 |