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

Abstract : Search for Scalar Quarks in e+e- Collisions at sqrt(s) up to 209 GeV 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 stop->c/u chi, stop->b l snu, sbottom-> b chi, squark-> q chi or in the stop four-body decay channel stop-> b chi f f' studied for the first time at LEP. The results of these searches yield improved mass lower limits. In particular, an absolute lower limit of 63GeV/c2 is obtained for the stop mass, at 95% confidence level, irrespective of stop lifetime and decay branching ratios.
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Journal articles

Cited literature [28 references]

http://hal.in2p3.fr/in2p3-00011717
Contributor : Magali Damoiseaux <>
Submitted on : Monday, July 1, 2002 - 12:12:31 PM
Last modification on : Tuesday, April 20, 2021 - 12:00:05 PM
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• HAL Id : in2p3-00011717, version 1

Citation

A. Heister, S. Schael, R. Barate, R. Bruneliere, I. de Bonis, et al.. Search for scalar quarks in $e^{+}e^{-}$ collisions at $\sqrt{s}$ up to 209 GeV. Physics Letters B, Elsevier, 2002, 537, pp.5-20. ⟨in2p3-00011717⟩

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