The Higgs Particle and Your Free Guide to the Higgs Boson

The ATLAS detector at CERN. The 27km long Large Hadron Collider (LHC) passes through the centre.

The search for the Higgs Particle (or Higgs Boson) was the main motivation for the construction of the Large Hadron Collider (LHC) at CERN on the Swiss/French border, which is arguably the biggest (and most expensive) physics experiment in history.
The Higgs Particle (or Higgs Boson) is a suspected but as-yet undiscovered particle which could fill a significant gap in our knowledge of why the universe is the way it is, and why some particles, such as electrons and quarks, have “mass” .

From--http://quantumwavepublishing.com/landing-pages/higgs2/