This is indeed a new particle. We know it must be a boson and it’s the heaviest boson ever found.
Joe Incandela, spokesperson, Large Hadron Collider, on what is believed to be the discovery of long-sought Higgs Boson particle. LiveScience, New Particle at World’s Largest Atom Smasher is Likely Higgs Boson.
The Higgs, nicknamed the “God particle” (to the chagrin of many scientists, who prefer its official name), is thought to hold the key to one of the mysteries of the universe: Why do things have mass?
Its discovery represents a major step forward in our understanding of why the universe exists as it does, with matter clumping together to form galaxies, stars, planets and us, scientists say.
Here’s a an animated explainer via OpenCulture about the significance of Higgs Boson.