Light Bottom Squark and Gluino Confront Electroweak Precision Measurements
- 13 August 2002
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 89 (9) , 091801
- https://doi.org/10.1103/physrevlett.89.091801
Abstract
We address the compatibility of a light sbottom (mass approximately 2-5.5 GeV) and a light gluino (mass approximately 12-16 GeV) with electroweak precision measurements. Such light particles have been suggested to explain the observed excess in the b quark production cross section at the Tevatron. The electroweak observables may be affected by the sbottom and gluino through the supersymmetric-QCD (SUSY-QCD) corrections to the Zbb vertex. We examine, in addition to the SUSY-QCD corrections, the gauge boson propagator corrections from the stop which are allowed to be light from the SU(2)(L) symmetry. We find that this scenario is strongly disfavored from electroweak precision measurements.Keywords
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