CERN EP seminar https://indico.cern.ch/event/1150962
The mass of the W boson, a mediator of the weak force between elementary particles, is tightly constrained by the symmetries of the standard model of particle physics. The Higgs boson was the last missing component of the model. After observation of the Higgs boson, a measurement of the W boson mass provides a stringent test of the model. We measure the W boson mass, MW, using data corresponding to 8.8 inverse femtobarns of integrated luminosity collected in proton-antiproton collisions at a 1.96 TeV center-of-mass energy with the CDF II detector at the Fermilab Tevatron collider. A sample of approximately 4 million W boson candidates is used to obtain MW=80,433.5±6.4stat±6.9syst=80,433.5±9.4 MeV/c2, the precision of which exceeds that of all previous measurements combined. This measurement is in significant tension with the standard model expectation.
The event will be held via zoom : https://cern.zoom.us/j/69359694008?pwd=Q3BqZlZMeHJnM2FTdlpuc2JZdWpmUT09
The Webcast retransmission will be available for this seminar, and the link is available on the original Indico page https://indico.cern.ch/event/1150962.
M. Pepe-Altarelli, P. Silva
