Abstract
Selected recent results on Higgs boson physics obtained with the ATLAS experiment at the LHC are presented. These include preliminary evidence for the Higgs Yukawa interaction with fermions based on ττ final states, results from an updated combined analyses of Higgs boson couplings, new mass measurements, constraints on the total width, differential cross section measurements as well as the search for rare production and decay modes.
Highlights
The discovery of a previously unobserved particle with a mass of about 125 GeV by the ATLAS [1] and CMS experiments at the LHC, which was announced in July 2012, provided an excellent candidate for the Higgs boson in the framework of the Standard Model of particle physics (SM)
In summer 2013, the ATLAS collaboration summarised their intermediate findings on the couplings [4] and evidence for the spin-0 nature [5] of the Higgs boson candidate, again focusing on the Higgs decay modes to boson pairs listed above
A selection of more recent results is used to provide an overview of the current status of Higgs boson studies with the ATLAS experiment
Summary
The discovery of a previously unobserved particle with a mass of about 125 GeV by the ATLAS [1] and CMS experiments at the LHC, which was announced in July 2012, provided an excellent candidate for the Higgs boson in the framework of the Standard Model of particle physics (SM). The observed rates and event properties, based on data corresponding to an integrated luminosity of about 5 fb−1 per experiment, were consistent with a single, narrow-width Higgs boson with production cross sections and branching fractions for the decays to bosons as predicted by the SM [2, 3]. All results use the complete ATLAS data√recorded at a proton-proton centre-of-mass energy of s = 8 TeV, which correspond to an integrated luminosity of 4.5-4.8 fb−1.
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