sentences:  The Large Electron–Positron Collider (LEP) was also proposed and constructed under his leadership.This facility allowed the verification of the standard model of particle physics, namely that it is a renormalizable field theory, leading to the award of the Nobel Prize to the theoreticians Veltman and t’Hooft.Furthermore, it enabled the precise determination of fundamental parameters of the electroweak force, such as the
  W± and Z masses, and proved the existence of three neutrino families.