Standard Model Higgs Boson with the L3 Experiment at LEP

TL;DR

This paper reports the final results of the search for the Standard Model Higgs boson using data from the L3 detector at LEP, setting a lower mass limit of 112.0 GeV based on energies up to 209 GeV.

Contribution

It provides the most recent experimental limits on the Higgs boson mass from LEP data, including the observation of a high-mass candidate event.

Findings

Lower mass limit of 112.0 GeV at 95% confidence level.

Observation of a candidate event at 115 GeV.

Data consistent with Standard Model predictions.

Abstract

Final results of the search for the Standard Model Higgs boson are presented for the data collected by the L3 detector at LEP at centre-of-mass energies up to about 209 GeV. These data are compared with the expectations of Standard Model processes for Higgs boson masses up to 120 GeV. A lower limit on the mass of the Standard Model Higgs boson of 112.0 GeV is set at the 95 % confidence level. The most significant high mass candidate is a Hnunu event. It has a reconstructed Higgs mass of 115 GeV and it was recorded at root(s)=206.4 GeV.