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:
?? nuclear and high energy physics ??
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Deposited On:
03 May 2013 09:32
Last Modified:
15 Jul 2024 13:49