Search for the lightest chargino at $\sqrt{s}$ = 130 and 136 GeV

Abstract : A search for pair production of the lightest chargino at $\rs=$ 130.4 and 136.3~GeV has been carried out using the data sample corresponding to the 5.92~${\rm pb}^{-1}$ recorded by the DELPHI detector during the high energy run of LEP in the last period of 1995. The theoretical reference model has been the Mi\-ni\-mal Supersymmetric Standard Model with R-parity conservation. The three topologies expected for the decay of a pair of charginos, namely two acoplanar leptons plus missing energy (\ll), two jets and an isolated lepton plus missing energy (\jjl) and missing energy in a hadronic environment (\jj), were investigated. No evidence of a signal was found. Lower mass limits were derived for various scenarios, including the case of a low mass difference between the chargino and the neutralino and of a light sneutrino. The mass limits range between 56.3~GeV/${\rm c}^2$ and the kinematic limit.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00001185
Contributor : Sylvie Flores <>
Submitted on : Tuesday, February 16, 1999 - 11:05:07 AM
Last modification on : Tuesday, November 19, 2019 - 2:37:41 AM

Identifiers

• HAL Id : in2p3-00001185, version 1

Citation

P. Abreu, W. Adam, T. Adye, E. Agasi, I. Azhinenko, et al.. Search for the lightest chargino at $\sqrt{s}$ = 130 and 136 GeV. Physics Letters B, Elsevier, 1996, 382, pp.323-336. ⟨in2p3-00001185⟩

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