The CDF experiment has just released their new average of top quark mass measurements, obtained with analyses that use up to 5.6 inverse femtobarns of proton-antiproton collisions provided by the 2-TeV Tevatron collider: the new measurement is  M(top) = 173.1 +- 0.7 (stat) +- 0.9 (syst) GeV, a measurement with a total uncertainty of 1.3 GeV, or 0.75%!

Have a look at the various measurements that enter the calculation in the graph below.

Sometimes my sympathy for science magazines (in print and online), which try to keep intelligent readers informed on the progress in basic science, gets dampened by observing how they end up providing a narrow-sighted look at things. What is at stake is usually not science popularization: an article you read does not need to inform you of all what is going on in a field of research; rather, it is the correct acknowledgement of the different efforts. It sometimes happens that a group works hard on something, they believe they have made great progress and furthered everybody's knowledge in the field, and then an article appears that discusses somebody else's contribution, which came later, was less successful, and less valuable.

UPDATE: if you came here to learn more details about the rumored Higgs signal, which media around the world are discussing and which Fermilab Today just dismiss-tweeted, please visit this other more recent post for more details. Below is the original post which apparently originated a lot of buzz.
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And for once, I feel totally free to speculate without the fear of being crucified. If you have followed my past blog adventures for long enough, you know that in at least a couple of occasions my posts have created some friction.

Z' Bosons: The Dream Moves Away

The long-distance competition between CERN and Fermilab - between Europe and the US, if you like - for supremacy in the field of fundamental physics is made of direct challenges, like the search for the Higgs boson, as much as of indirect skirmishes, such as one facility excluding a signal that the other facility has a chance of discovering.