Apr 18, 2001
Searches for the Higgs Boson at LEP
Dr. Thomas Junk, CERN
The precise mechanism for electroweak symmetry breaking is still unknown.
Precision measurements from LEP, the TeVatron, SLD, and elsewhere indicate
that the Higgs boson, assuming the Minimal Standard Model describes the
low-energy behavior of particles and fields, may be light enough to have
been produced at LEP in its final year of operation. A review is given
of the motivation for the searches, improvements made to the LEP
accelerator, and the results of the searches for the Standard Model Higgs
boson. A lower limit of mH > 113.5 GeV is obtained by combining the results
of the four experiments together, and an excess of 2.9 sigma is observed
at mH=115 GeV.
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