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 HZZ()4H \rightarrow ZZ^{(*)}\rightarrow 4\ell, with up to 4.8 fb1^{-1} of pppp collision data at s=7\sqrt{s}=7 TeV and 13 fb1^{-1} at s=8\sqrt{s}=8 TeV. The combined mass measurement derived from the H\rightarrow\,\gamma\gamma and HZZ()4H \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, Hτ+τH \rightarrow \tau^+\tau^- and HbbˉH \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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