And the W mass is… January 5, 2007Posted by dorigo in news, physics, science.
The formal blessing of the number extracted by the very long and complex analysis of electron and muon data by CDF – a total of 200 inverse picobarns of data collected between 2001 and 2003 – happened on December 21st, 2006 – but the final release of the number was only possible today, following the Wine and Cheese seminar given at Fermilab by the authors.
CDF’s new W mass measurement is now public. The W boson mass is measured at
M = 80413 +- 48 MeV
That is pretty high, and it will pull upwards the electroweak fits, with a consequent lowering of the Higgs boson mass central value, plus a tightening of its error bar. I will have to say more about that later…