Answer: Episode title!
This one's tricky! While the title pays tribute to the Higgs Boson Particle, which was named after a real scientist who discovered said particle, there isn't actually a Higgs Boson Theory. Instead, after learning that Peter Higgs' research could be honored with a Nobel Prize, Sheldon hired a young assistant to help him see if his own work could garner some recognition.
As far as Sheldon's concerned, there's no such thing as too many accolades.