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 product
EUROPEANORGANIZATIONFORNUCLEARRESEARCH(CERN)
CERN-EP/2000-138November13,2000
arXiv:hep-ex/0011045v1 15 Nov 2000
ObservationofanExcessintheSearchfortheStandardModelHiggsBosonatALEPH
TheALEPHCollaboration )
Abstract
AsearchhasbeenperformedfortheStandardModelHiggsbosoninthedatasamplecollectedwiththeALEPHdetectoratLEP,atcentre-of-massenergiesupto209GeV.Anexcessof3σbeyondthebackgroundexpectationisfound,consistentwiththeproductionoftheHiggsbosonwithamassnear114GeV/c2.Muchofthisexcessisseeninthefour-jetanalyses,wherethreehighpurityeventsareselected.
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