Observation of an excess in the search for the standard model Higgs boson at ALEPH

ALEPH Collaboration, The and Barate, R. and Bouhova-Thacker, Evelina and Bowdery, Christopher and Finch, Alexander and Foster, Frank and Hughes, Gareth and Jones, Roger and Smizanska, Maria (2000) Observation of an excess in the search for the standard model Higgs boson at ALEPH. Physics Letters B, 495 (1-2). pp. 1-17. ISSN 0370-2693

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 209 GeV. An excess of 3σ beyond the background expectation is found, consistent with the production of the Higgs boson with a mass near 114 GeV/c2. Much of this excess is seen in the four-jet analyses, where three high purity events are selected.