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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: Article
Journal or Publication Title: European Physical Journal C: Particles and Fields
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 82974
Deposited By: ep_importer_pure
Deposited On: 16 Nov 2016 14:44
Refereed?: Yes
Published?: Published
Last Modified: 21 Sep 2017 01:52
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/82974

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