An update of the searches for charginos and neutralinos is presented, based on a data sample corresponding to the 53.9 pb(-1) recorded by the DELPHI detector in 1997, at a centre-of-mass energy of 183 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 172 GeV. The (mu M-2) domain excluded by combining the neutralino and chargino searches implies a limit on the mass of the Lightest neutralino which, for a heavy sneutrino, is constrained to be above 29.1 GeV/c(2) for tan beta greater than or equal to 1. (C) 1999 Elsevier Science B.V. All rights reserved.

Search for charginos, neutralinos and gravitinos in e(+)e(-) interactions at root s = 183 GeV

GASPARINI, UGO;MARGONI, MARTINO;RONCHESE, PAOLO;SIMONETTO, FRANCO;ZUMERLE, GIANNI
1999

Abstract

An update of the searches for charginos and neutralinos is presented, based on a data sample corresponding to the 53.9 pb(-1) recorded by the DELPHI detector in 1997, at a centre-of-mass energy of 183 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 172 GeV. The (mu M-2) domain excluded by combining the neutralino and chargino searches implies a limit on the mass of the Lightest neutralino which, for a heavy sneutrino, is constrained to be above 29.1 GeV/c(2) for tan beta greater than or equal to 1. (C) 1999 Elsevier Science B.V. All rights reserved.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2500130
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