High-precision measurement of the W boson mass at the LHC

Описание: The ATLAS Collaboration reports the first high-precision measurement at the Large Hadron Collider (LHC) of the mass of the W boson, using data from proton-proton collisions at 7 TeV.

The reported result gives a value of 80370±19 MeV for the W mass, which is consistent with the expectation from the Standard Model of Particle Physics. It matches previous measurements obtained at LEP, the ancestor of the LHC at CERN, and at the Tevatron, a former accelerator at Fermilab in the United-States, whose data made it possible to continuously refine this measurement, over the last 20 years.

Find out more: http://cern.ch/go/W7lW

Video: CERN