par Abreu, Pedro;Bertrand, Daniel 
;Herquet, Philippe ;Huet, Kathy ;Lefebure, Véronique ;Vander Velde, Catherine ;Wickens, John H. ; [et al.]
Référence Physics letters. Section B, 479, 1-3, page (129-143)
Publication Publié, 2000-04-20
;Herquet, Philippe ;Huet, Kathy ;Lefebure, Véronique ;Vander Velde, Catherine ;Wickens, John H. ; [et al.]Référence Physics letters. Section B, 479, 1-3, page (129-143)
Publication Publié, 2000-04-20
Article révisé par les pairs
| Résumé : | 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/c2 higher than those obtained at a centre-of-mass energy of 183 GeV. The (μ, M2) 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/c2 for tan β ≥ 1. |
