Observation of a Higgs boson at 125 GeV and search for an additional low-mass Higgs boson in the diphoton channel in CMS

5 Sep 2016, 14:45
Amphi Dirac (IPNL)

Amphi Dirac



Mr Benoit Courbon


An observation of the Higgs boson production for the two photon decay channel with the 2016 LHC Run 2 data is described. The analysis is performed using the dataset recorded by the CMS experiment at the LHC from pp collisions at centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 12.9 fb-1. The observed significance at the Run 1 ATLAS+CMS combined mH = 125.09 GeV is 5.6 sigma, where 6.2 sigma is expected. The best-fit signal strength relative to the standard model prediction is 0.95 +/- 0.20. Also, a search for an additional light Higgs boson decaying into two photons, in the mass range 80-110 GeV, is reported. This search is performed using a dataset of 19.7 fb-1 recorded by CMS at a center of mass energy of 8 TeV. No evidence for new particle is observed.

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