The Higgs Boson has not been discovered (again, in the same place)

Data from Fermilab's shuttered Tevatron accelerator seems to support the data released by CERN last December. These two different accelerators are both seeing a signal that could be the Higgs Boson in roughly the same place. To quote the New York Times: "It has led to a joke in physics circles now: The Higgs boson has not been discovered yet, but its mass is 125 billion electron volts." (Via dsut in Submitterator) Read the rest

Sunset on the Tevatron: Photos and memories from a Fermilab physicist

For more than 20 years, the Tevatron reigned as the gold standard in particle accelerators. Under a berm outside Batavia, Illinois, the machine pushed protons and antiprotons to high energies around circular tracks before crashing them into each other. What's the point of that? When high-energy protons and antiprotons collide, they reproduce the conditions at the beginning of the Universe, just after the Big Bang. In the wreckage, you can find particles that don't normally exist, and observe phenomena that humans have never seen before. By rubbernecking at a particle crash, researchers hope to better understand life, the Universe, and everything. It's kind of a big deal.

But on Friday, September 30, the Tevatron smashed its last protons.

Ultimately, the Tevatron was simply the victim of the progress of technology. When it opened in 1983, it replaced older, lower-energy accelerators. And, in turn, the Tevatron has been replaced by the Large Hadron Collider, an accelerator capable of pushing particles to even higher energies. Once that happened, it was only a matter of time before the Tevatron felt the budgetary axe.

The end of the Tevatron doesn't mean the end of research at the Fermi National Accelerator Laboratory, and it doesn't mean the end of particle research in the United States. But it is the end of an era.

William S. Higgins is a radiation safety physicist at Fermilab, and a contributor to He helped build the Tevatron and he was on hand last Friday, recording his thoughts and some photos to share with us. Read the rest