Search for scalar quarks in $e^+ e^-$ collisions at $s$ up to 209-GeV

ALEPH Collaboration, The and Heister, A. and Bouhova-Thacker, Evelina and Bowdery, Christopher and Finch, Alexander and Foster, Frank and Hughes, Gareth and Jones, Roger and Smizanska, Maria (2002) Search for scalar quarks in $e^+ e^-$ collisions at $s$ up to 209-GeV. Physics Letters B, 537 (1-2). pp. 5-20. ISSN 0370-2693

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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.

Item Type: Journal Article
Journal or Publication Title: Physics Letters B
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100/3106
Departments: Faculty of Science and Technology > Physics
ID Code: 63912
Deposited By: ep_importer_pure
Deposited On: 03 May 2013 09:32
Refereed?: Yes
Published?: Published
Last Modified: 11 Feb 2020 08:09

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