Pii: s0370-2693(98)01505-6

M. Acciaiti,O. Adriani,M. Aguilar-Benitez, S., Ahlen,J. Alcaraz,J. Allaby,A. Aloisio,G. Ambrosi,H. Anderhub,V. P. Andreev, T., Angelescu,F. Anselmo,A. Arefiev, Azemoon,L. Baksay,S. Banerjee,Sw. Banerjee,K. Banicz,R. Barillere,P. Bartalini,A. Baschirotto,F. Becattini,U. Becker,F. Behner,P. Berges, Bhattacharya,A. Biland,J. J. Blaising,G. J. Bobbink,R. Bock,A. Bohm, L., Boldizsar,M. Bourquin,S. Braccini,J. G. Branson,V. Brigljevic,A. Buffini,A. Buijs, J. D. Burger,A. Button,X. D. Cai,M. Capell,A. M. Cartacci,F. Cesaroni,U. K. Chaturvedi,G. Chen,G. M. Chen, H. S. Chen,X. Chereau,C. Y. Chien,L. Cifarelli,C. Civinini,I. Clare,R. Clare,G. Coignet,A. P. Colijn,S. Costantini,A. Csilling,A. Degre,M. Dittmar,M. T. Dova,D. Duchesneau,P. Duinker,H. El Mamouni,F. J. Eppling,A. Favara

semanticscholar（2019）

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Abstract

Searches for scalar top and scalar bottom quarks have been performed at center-of-mass energies between 161 GeV and 183 GeV using the L3 detector at LEP. No signal is observed. Model-independent limits on production cross sections are determined for the two decay channels tj TM cx'0' and bi TM by01. Within the framework of the Minimal Supersymmetric extension of the Standard Model mass limits are derived. For mass differences between tj and x'0' greater than 10 GeV a 95% C.L. limit of 81.5 GeV is set on the mass of the Supersymmetric partner of the left-handed top. A supersymmetric partner of the left-handed bottom with a mass below 80 GeV is excluded at 95% C.L. if the mass difference between b1 and X0 is greater than 20 GeV. © 1999 Published by Elsevier Science B.V. All rights reserved.

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