• On April 7, researchers from the Collider Detector at Fermilab (CDF) Collaboration, in the United States, announced that they had made an accurate measurement of the mass of the W boson. They said that this precisely determined value did not correspond to estimates of the standard model of particle physics.

  • The recent experiment which measured the mass of the W boson at 80,433.5 +/- 9.4 Mev/c2 is greater than expected from the Standard Model. The expected value using the standard model is 80,357 +/- 8 MeV/c2. This implies the incompleteness of the description of the standard model.

  • This mass difference of the W boson must be verified and confirmed with the same precision by other research facilities.