Switzerland: Crash Course in "new physics"

CERN’s chief scientific officer, Jos Engelen, is from the Netherlands. He serves under the director general, who is from France, and alongside the chief financial officer, who is from Germany. I went to speak to Engelen in his office; behind his desk a chart indicated when the various parts of the collider are supposed to be completed. It was a crazy quilt of multicolored blocks, with lines radiating in all directions. Engelen greeted me with a half-ironic cheerfulness that struck me as very Dutch. Among his responsibilities is dealing with the frequent calls and letters CERN receives about the possibility that the Large Hadron Collider will destroy the world. When I asked about this, Engelen picked up a Bic pen and placed it in front of me.

“In quantum mechanics, there is a probability that this pen will fall through the table,” he said. “All of a sudden, it will be on the floor. Because it can behave as a wave, it can go through; we call that the ‘tunnel effect.’ If you calculate the probability that this happens, it is not identical to zero. It is a very small probability. But it never happens. I’ve never seen it happen. You have never seen it happen. But to the general public you make a casual remark, ‘It is not identical to zero, it is very small,’ and . . . ” He shrugged.

Worries about the end of the planet have shadowed nearly every high-energy experiment. Such concerns were given a boost by Scientific American—presumably inadvertently—in 1999. That summer, the magazine ran a letter to the editor about Brookhaven’s Relativistic Heavy Ion Collider, then nearing completion. The letter suggested that the Brookhaven collider might produce a “mini black hole” that would be drawn toward the center of the earth, thus “devouring the entire planet within minutes.” Frank Wilczek, a physicist who would later win a Nobel Prize, wrote a response for the magazine. Wilczek dismissed the idea of mini black holes devouring the earth, but went on to raise a new possibility: the collider could produce strangelets, a form of matter that some think might exist at the center of neutron stars. In that case, he observed, “one might be concerned about an ‘ice-9’-type transition,” wherein all surrounding matter could be converted into strangelets and the world as we know it would vanish.

For more: Annals of Science: Crash Course : The New Yorker