RHCPP 01-07 (PUB)
2001

 
 

Royal Holloway Centre for Particle Physics


Search for the Standard Model Higgs Boson at LEP

The LEP Higgs working group
 
Abstract
The four LEP collaborations, ALEPH, DELPHI, L3 and OPAL, have collected 2465 pb- 1 of e+e- collision data at energies between 189 and 209GeV, of which 542 pb-1 were collected above 206GeV. Searches for the Standard Model Higgs boson have been performed by each of the LEP collaborations. Their data have been combined and examined for their consistency with the Standard Model background and various Standard Model Higgs boson mass hypotheses. A lower bound of 114.1GeV has been obtained at the 95% confidence level for the mass of the Higgs boson. The likelihood analysis shows a preference for a Higgs boson with a mass of 115.6GeV. At this mass, the probability for the background to generate the observed effect is 3.4%. The results quoted in this paper are combinations of preliminary results from three collaborations and final results from one collaboration.
 
Available format:  Postscript
Also published as:
CERN-EP/2001-055
LHWG Note/2001-03