Search for charginos in e(+)e(-) interactions at root s=189 GeV
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Search for charginos in e(+)e(-) interactions at root s=189 GeV

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Search for charginos in e(+)e(-) interactions at root s=189 GeV

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DELPHI Collaboration; Alemany Fernández, Reyes; Cabrera Urbán, Susana Perfil; Castillo Giménez, María Victoria Perfil; Cortina Gil, Eduardo; Costa Mezquita, María José; Ferrer Soria, Antonio Perfil; Fuster Verdú, Juan A. Perfil; García García, Carmen Perfil; Gil Botella, Inés; Hernández Rey, Juan José Perfil; Higón Rodríguez, Emilio Perfil; Martínez Vidal, Fernando Perfil; Oyanguren Campos, Arantza Perfil; Salt Cairols, José Perfil; Tortosa Martínez, Pablo
Aquest document és un/a article, creat/da en: 2000

Este documento está disponible también en : http://dx.doi.org/10.1016/S0370-2693(00)00313-0
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.

    DELPHI Collaboration Alemany, R. Cabrera Urbán, Susana Castillo Giménez, María Victoria Cortina, E. Costa, M. Ferrer Soria, Antonio Fuster Verdú, Juan A. García García, Carmen Gil, I. Hernández Rey, Juan José Higón Rodríguez, Emilio Martínez Vidal, Fernando Oyanguren Campos, Arantza Salt Cairols, José ,Tortosa Martínez, Pablo, 2000 Search for charginos in e(+)e(-) interactions at root s=189 GeV Physics Letters B 479 1-3 129 143
http://dx.doi.org/10.1016/S0370-2693(00)00313-0
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