Higgs boson

From CERN, May 24, 2019: The CMS collaboration used a large proton–proton collision dataset, collected during the Large Hadron Collider’s second run, to search for instances in which the Higgs boson might transform, or “decay”, into a photon and a massless dark photon.

From Science, Sept. 13, 2018: At a recent workshop at Fermilab, more than 100 physicists gathered to hone the conceptual tools needed for the long search for collisions that produce not just one Higgs boson, but two. Fermilab scientists Marcela Carena and Caterina Vernieri, as well as others on CMS and ATLAS, comment on the plan.