LIP Lisboa

Observation of an Excess of Events in the Search for the Standard Model Higgs Boson in the H -> WW -> l nu l nu Channel with the ATLAS Detector

Name: Observation of an Excess of Events in the Search for the Standard Model Higgs Boson in the H -> WW -> l nu l nu Channel with the ATLAS Detector
Start: 2012-10-11T11:30:00+00:00
End: 2012-10-11T12:30:00+00:00
Location: LIP _ Lisbon

by Joana Miguéns (LIP)

Thursday 11 Oct 2012, 11:30 → 12:30 UTC

LIP _ Lisbon

Description

The ATLAS Experiment at CERN is exploring the frontiers of Particle Physics. It has, so far, successfully analyzed more than 10fb^-1 (and collected more than 18fb^-1) of proton-proton collision data from the LHC, at 7 and 8TeV centre-of-mass energies. One of the primary goals for ATLAS is the discovery of the Higgs boson, the missing piece in the Standard Model theory, which is at the origin of mass generation for the particles that constitute conventional matter. The search for the Higgs boson at the LHC started more than two decades ago and on the 4th of July 2012, the discovery of a new heavy particle, consistent with the Standard Model Higgs Boson, was announced at CERN by the ATLAS and CMS Collaborations. The discovery relied on different analyses, focusing on different Higgs decay modes. I have been working on the H->WW->lnulnu analysis within the ATLAS Collaboration, where we explore the detection of the Higgs boson by identifying pairs of W bosons decaying into leptons (electrons or muons and
corresponding neutrinos). Here, I will present the results obtained by this search channel which, when combining the 7TeV and 8TeV datasets, observed an excess of events of 2.8 standard deviations at mH=125GeV.