# Photon 2015

15-19 June 2015
Asia/Novosibirsk timezone
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# Contribution

Higgs and photons, electroweak and new physics

# Latest results on Higgs final-states with photons in ATLAS

## Speakers

• Dr. Yohei YAMAGUCHI

## Content

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.