ScienceDaily -- The world's most precise measurement of the mass of the W boson, one of nature's elementary particles, has been achieved by scientists from the CDF and DZero collaborations at the Department of Energy's Fermi National Accelerator Laboratory. The new measurement is an important, independent constraint of the mass of the theorized Higgs boson. It also provides a rigorous test of the Standard Model that serves as the blueprint for our world, detailing the properties of the building blocks of matter and how they interact.
MORE: http://www.sciencedaily.com/releases/2012/03/120302132428.htm
See also...
Direct Measurement of the Formation Length of Photons
http://www.sciencedaily.com/releases/2012/02/120228102009.htm
