Measurements of Higgs boson properties in ATLAS

Combined measurements of the properties of the Higgs boson using the full pp collision data sample recorded by the ATLAS experiment at the LHC are presented. The combined mass measurement derived from the $H \rightarrow \gamma\gamma$ and $H \rightarrow ZZ^{(*)} \rightarrow 4\ell$ channels is $m_H = 125.5 \pm 0.2$ (stat) $^{+0.5}_{-0.6}$ (sys) GeV. The signal strength, from the combination of the $H \rightarrow \gamma\gamma$, $H \rightarrow ZZ^{(*)} \rightarrow 4\ell$, and $H \rightarrow WW^{(*)} \rightarrow \ell\nu\ell\nu$ channels, as well as the $H \rightarrow \tau\tau$ and $H \rightarrow b\bar{b}$ channels using a partial dataset, is determined to be $\mu = 1.30 \pm 0.13$ (stat) $\pm 0.14$ (sys). The cross section ratio between vector boson mediated and gluon initiated Higgs boson production processes is found to be $\mu_{\mathrm{VBF}+VH}/\mu_{\mathrm{ggF}+t\bar{t}H} = 1.2^{+0.7}_{-0.5}$, giving more than 3$\sigma$ evidence for Higgs production through vector-boson fusion. Measurements of relative branching fraction ratios, as well as combined fits testing the fermion and vector couplings, couplings to W and Z, and the contribution of new particles show no significant deviation from the Standard Model expectation.