Searches for scalar top, scalar bottom and mass-degenerate scalar quarks are performed in the data collected by the ALEPH detector at LEP, at centre-of-mass energies up to 209 GeV, corresponding to an integrated luminosity of 675 pb−1. No evidence for the production of such particles is found in the decay channels , , , or in the stop four-body decay channel studied for the first time at LEP. The results of these searches yield improved mass lower limits. In particular, an absolute lower limit of 63 GeV/c2 is obtained for the stop mass, at 95% confidence level, irrespective of the stop lifetime and decay branching ratios.

Search for scalar quarks in e+e− collisions at up to 209 GeV / A Heister, S Schael, R Barate, R Brunelière, I De Bonis, D Decamp, C Goy, S Jezequel, J.-P Lees, F Martin, E Merle, M.-N Minard, B Pietrzyk, B Trocmé, G Boix, S Bravo, M.P Casado, M Chmeissani, J.M Crespo, E Fernandez, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 537:(2002), pp. 5-20. [10.1016/S0370-2693(02)01827-0]

Search for scalar quarks in e+e− collisions at up to 209 GeV

FOCARDI, ETTORE;CIULLI, VITALIANO;
2002

Abstract

Searches for scalar top, scalar bottom and mass-degenerate scalar quarks are performed in the data collected by the ALEPH detector at LEP, at centre-of-mass energies up to 209 GeV, corresponding to an integrated luminosity of 675 pb−1. No evidence for the production of such particles is found in the decay channels , , , or in the stop four-body decay channel studied for the first time at LEP. The results of these searches yield improved mass lower limits. In particular, an absolute lower limit of 63 GeV/c2 is obtained for the stop mass, at 95% confidence level, irrespective of the stop lifetime and decay branching ratios.
2002
537
5
20
A Heister;S Schael;R Barate;R Brunelière;I De Bonis;D Decamp;C Goy;S Jezequel;J.-P Lees;F Martin;E Merle;M.-N Minard;B Pietrzyk;B Trocmé...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/658514
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