Search for nearly mass-degenerate charginos and neutralinos at LEP

Bailey, Ian Richard and Kartvelishvili, Vakhtang (2003) Search for nearly mass-degenerate charginos and neutralinos at LEP. European Physical Journal C: Particles and Fields, 29 (4). pp. 479-489. ISSN 1434-6044

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Abstract

A search was performed for charginos with masses close to the mass of the lightest neutralino in e+e− collisions at centre-of-mass energies of 189-209 GeV recorded by the OPAL detector at LEP. Events were selected if they had an observed high-energy photon from initial state radiation, reducing the dominant background from two-photon scattering to a negligible level. No significant excess over Standard Model expectations has been observed in the analysed data set corresponding to an integrated luminosity of 570 pb-1. Upper limits were derived on the chargino pair-production cross-section, and lower limits on the chargino mass were derived in the context of the Minimal Supersymmetric Extension of the Standard Model for the gravity- and anomaly-mediated Supersymmetry breaking scenarios.

Item Type:
Journal Article
Journal or Publication Title:
European Physical Journal C: Particles and Fields
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2201
Subjects:
ID Code:
82974
Deposited By:
Deposited On:
16 Nov 2016 14:44
Refereed?:
Yes
Published?:
Published
Last Modified:
06 May 2020 04:41