July 4, 2012, at CERN conference, confirmation of particle consistent with the Standard Model Higgs boson.

On CERNS's Twitter feed, "we have observed a new boson with a mass of 125.3 ± 0.6 GeV at 4.9 sigma significance."

CERN Press Release, July 4, 2012: CERN experiments observe particle consistent with long-sought Higgs boson

From ATLAS experiment, Photo Event: Event displays and plots of latest results from ATLAS Higgs Search