UNIGE document Scientific Article
previous document  unige:47217  next document
add to browser collection
Title

Search for charginos and neutralinos in e+e collisions at √s=189 GeV

CollaborationWith : Achard, Pablo / Ambrosi, Giovanni / Bourquin, Maurice / Braccini, Saverio / Chamizo Llatas, Maria / Deglon, Patrick / Delmeire, Evelyne / Extermann, Pierre / Field, John / Kienzle, Maria-Novella / Muheim, Franz / Pohl, Martin / Produit, Nicolas / Sciarrino, Deborah
Published in Physics Letters. B. 2000, vol. 472, no. 3-4, p. 420-433
Abstract We report the result of a search for charginos and neutralinos, in e+e− collisions at 189 GeV centre-of-mass energy at LEP. No evidence for such particles is found in a data sample of 176 pb−1. Improved upper limits for these particles are set on the production cross sections. New exclusion contours in the parameter space of the Minimal Supersymmetric Standard Model are derived, as well as new lower limits on the masses of these supersymmetric particles. Under the assumptions of common gaugino and scalar masses at the GUT scale, we set an absolute lower limit on the mass of the lightest neutralino of 32.5 GeV, and a limit on the mass of the lightest chargino of 67.7 GeV for M2<2 TeV.
Identifiers
Full text
Structures
Citation
(ISO format)
L3 COLLABORATION. Search for charginos and neutralinos in e+e collisions at √s=189 GeV. In: Physics Letters. B, 2000, vol. 472, n° 3-4, p. 420-433. https://archive-ouverte.unige.ch/unige:47217

177 hits

31 downloads

Update

Deposited on : 2015-02-23

Export document
Format :
Citation style :