ATLAS
PRELIMINARY
SM
An update of combined measurements of the new Higgs-like boson with high mass resolution channels

An update is presented of the measurement of the newly discovered boson properties using the high mass resolution channels, H\rightarrow\,\gamma\gamma and H→ZZ(∗)→4ℓH \rightarrow ZZ^{(*)}\rightarrow 4\ell, with up to 4.8 fb−1^{-1} of pppp collision data at s=7\sqrt{s}=7 TeV and 13 fb−1^{-1} at s=8\sqrt{s}=8 TeV. The combined mass measurement derived from the H\rightarrow\,\gamma\gamma and H→ZZ(∗)→4ℓH \rightarrow ZZ^{(*)}\rightarrow 4\ell channels is m_H=125.2 \pm 0.3\,(stat)\,\, \pm 0.6\,(sys) GeV. The combination of all final states, including the recently updated low mass resolution channels H\rightarrow\,WW^{(*)}{\rightarrow\,}\ell\nu\ell\nu, H→τ+τ−H \rightarrow \tau^+\tau^- and H→bbˉH \rightarrow b\bar{b}, is reported for this data set in terms of the combined signal strength (μ\mu). This is determined to be μ=1.35±0.24\mu = 1.35 \pm 0.24 computed at a mass of 125 GeV, in agreement with the Standard Model expectation.

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