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And the W mass is… January 5, 2007

Posted by dorigo in news, physics, science.
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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…

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1. dorigo - December 23, 2006

This post was originally posted on December 21st, but then made private until now (January 5th 2007) when I realized the measurement was not public until a formal announcement was made at a Wine and Cheese seminar at Fermilab…


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