Researchers found four new particles made of the same four building blocks.
LHC
GeekWire, Jan. 6, 2016: The Higgs boson is the biggest find of the century in particle physics, but for the past few weeks, physicists at the Large Hadron Collider have been considering whether there’s a mystery that’s even bigger. Or at least more massive. Fermilab’s Don Lincoln is quoted in this article.
The New York Times, Dec. 15, 2015: Fermilab Deputy Director Joe Lykken is quoted in this article on ATLAS and CMS results that point to traces of what could be a new fundamental particle.