Higgs search at ATLAS
Sofia Maria Consonni (for the ATLAS Collaboration)

TL;DR
This paper reports the discovery and detailed measurements of the Higgs boson at ATLAS, confirming its properties align with the Standard Model predictions based on data from the LHC at 7 and 8 TeV.
Contribution
It provides the first observation of the Higgs boson at ATLAS and measures its mass, couplings, and quantum properties with high precision, confirming the Standard Model.
Findings
Higgs boson observed with mass 125.5 GeV
Measured couplings consistent with Standard Model
No evidence for additional Higgs states
Abstract
In this paper the results of Higgs searches at the ATLAS experiment, operating at the LHC, are summarised. The results are based on data samples corresponding to an integrated luminosity of up to 20.7 fb-1 at a centre-of-mass energy of 8 TeV and 4.6 fb-1 at 7 TeV. The observation of a Higgs boson is established. The mass of the new boson is measured to be 125.5 +/- 0.2 (stat) +0.5-0.6 (syst) GeV, and the ratio of the observed number of events and expected from a Standard Model Higgs Boson is compatible with unity, mu = 1.30 +/- 0.13 (stat) +/- 0.14 (sys). The spin and parity properties as well as the couplings structure are compatible with those predicted for a Standard Model Higgs Boson. No evidence of further Higgs states is found.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · High-Energy Particle Collisions Research · Particle Detector Development and Performance
