Scientists of the CDF collaboration at the Department of Energy’s Fermi National Accelerator Laboratory announced the world’s most precise measurement by a single experiment of the mass of the W boson, the carrier of the weak nuclear force and a key parameter of the Standard Model of particles and forces. The new W-mass value leads to an estimate for the mass of the yet-undiscovered Higgs boson that is lighter than previously predicted, in principle making observation of this elusive particle more likely by experiments at the Tevatron particle collider at Fermilab.
https://news.fnal.gov/2007/01/cdf-precision-measurement-w-boson-mass-suggests-lighter-higgs-particle/