fundamental? The modern atom model The scale of the atom What are we looking for? The standard model The standard model quiz
What is the Mass of the Boson?
Unfortunately, the theory that predicted its existence didn't specify the mass of the Higgs boson. As the years went by it became clear that the Higgs boson would be extremely massive, and most likely beyond the reach of all machines built prior to the Large Hadron Collider (LHC).
Remember that since E=mc2, the higher a particle's mass, the more energy we need to produce one.
By the time the LHC started collecting data in 2010, experiments at other accelerators had shown that the mass of a Higgs boson had to be greater than about 115 GeV/c2. The LHC experiments planned to search for evidence anywhere in the mass range 115-600 GeV/c2 or even up to 1,000 GeV/c2.