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Monday, March 2, 2020

25th anniversary of top quark discovery.

How time does not stand still...25 years ago we published the discovery of the top quark, the 6th quark the filled in the last slot of quarks as predicted by the Standard Model. It is by far the heaviest fundamental particle, meaning we don't think it is made of smaller pieces, we know of, and has a very short lifetime before it decays into many possible sets of other particles. I was a member of the CDF collaboration that co-wrote the discovery paper with another experiment, D0, that was on the other side of Fermilab's 4-mile circumference ring. We ran at nearly 2 trillion volts in order to produce the top quark in 'mini Big Bangs' by colliding protons and antiprotons together, which produce a burst of energy; every so often a top-antitop pair would be produced.

Ah, the good ol' days! I'm in the audience somewhere! It was a packed house, with the international press all throughout Wilson Hall.


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