First observation of the direct coupling of the Higgs boson and top quark – May 4 talk

Earlier today the CMS paper titled “Observation of ttH Production” was accepted for publication by Physical Review Letters. In this article, the CMS collaboration presented the first observation of the coupling between the Higgs boson and the top quark. The strength of this coupling as measured by CMS is consistent with the Standard Model expectation. This observation connects for the first time directly the two heaviest elementary particles of the Standard Model: the top quark, which was discovered in 1995 at the Tevatron by the CDF and DZero experiments, and the Higgs boson, which was discovered in 2012 at CERN by the ATLAS and CMS experiments. It was also the first direct evidence of the Higgs boson coupling to up-type fermions.

More information is available from the CMS webpages at

This historic milestone is presented at a CERNwide seminar on April 10 and at the Fermilab Joint Experimental-Theoretical Physics Seminar on May 4.