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Higgs Searches in ATLAS
Schaffer A.C.
XXXII Physics in Collision 2012, Štrbské Pleso : Slovaquie (2012) - http://hal.in2p3.fr/in2p3-00733818
Physique/Physique des Hautes Energies - Phénoménologie
Physique/Physique des Hautes Energies - Expérience
Higgs Searches in ATLAS
A.C. Schaffer1
1 :  LAL - Laboratoire de l'Accélérateur Linéaire
CNRS : UMR8607 – IN2P3 – Université Paris XI - Paris Sud
Centre Scientifique d'Orsay B.P. 34 91898 ORSAY Cedex
This talk covers the results of a search for the Standard Model Higgs boson in proton-proton collisions with the ATLAS detector at the LHC. The datasets used correspond to integrated luminosities of approximately 4.8 fb-1 collected at sqrt(s) = 7 TeV in 2011 and 5.8 fb-1 at sqrt(s) = 8 TeV in 2012. Individual searches in the channels H->ZZ(*)->4l, H->\gamma\gamma\ and H->WW(*)->e\nu\mu\nu\ in the 8 TeV data are combined with previously published results of searches for H->ZZ(*), WW(*), bb and \tau+\tau- in the 7 TeV data and results from improved analyses of the H->ZZ(*)->4l and H->\gamma\gamma\ channels in the 7 TeV data. Clear evidence for the production of a neutral boson with a measured mass of 126.0 +/- 0.4 (stat) +/- 0.4 (sys) GeV is presented. This observation, which has a significance of 5.9 standard deviations, corresponding to a background fluctuation probability of 1.7 x 10-9, is compatible with the production and decay of the Standard Model Higgs boson. First measurements of the couplings of this particle are presented and are compatible with a SM Higgs boson hypothesis.

Communications sans actes

XXXII Physics in Collision 2012
Štrbské Pleso
R.D. Schaffer

LAL 12-344
On behalf of the ATLAS Collaboration

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