Speaker
Dr
Yohei Yamaguchi
(Osaka University)
Description
A measurement of the Higgs boson property with photon final states in proton-proton collisions with the ATLAS detector at the LHC is presented.
The results are based on the data samples corresponds to integrated luminosities of 4.7 fb$^{-1}$ at $\sqrt{s}=7$ TeV in 2011 and 20.3 fb$^{-1}$ at $\sqrt{s}=8$ TeV in 2012.
From a narrow resonance in diphoton mass spectrum, the mass of the Higgs boson is measured to be $m_{H} = 125.98 \pm 0.50$ GeV.
The measured signal yield, which is a cross section times branching fraction normalised to the Standard Model expectation, is $1.17 \pm 0.27$.
These results are based on improvements of photon energy reconstruction with the ATLAS detector.
Primary author
Dr
Yohei Yamaguchi
(Osaka University)
