Observation of an Excess in the Search for the Standard Model Higgs Boson at ALEPH

TL;DR

This paper reports an excess in the search for the Standard Model Higgs boson at ALEPH, with a 3sigma significance near 114GeV/c2, based on data from LEP at energies up to 209GeV.

Contribution

First evidence of a Higgs boson signal at LEP with a 3sigma excess near 114GeV/c2, using four-jet analysis techniques.

Findings

3sigma excess observed near 114GeV/c2

Three high purity four-jet events detected

Consistent with Higgs boson production in the Standard Model

Abstract

A search has been performed for the Standard Model Higgs boson in the data sample collected with the ALEPH detector at LEP, at centre-of-mass energies up to 209GeV. An excess of 3sigma beyond the background expectation is found, consistent with the production of the Higgs boson with a mass near 114GeV/c2. Much of this excess is seen in the four-jet analyses, where three high purity events are selected.