A Tiny Particle’s Wobble Could Upend the Known Laws of Physics
At Fermilab, a brand new campus dedicated to learning muons was being constructed.
“That opened up a world of risk,” Dr. Polly recalled in his biographical article. By this time, Dr. Polly was working at Fermilab; he urged the lab to redo the g-2 experiment there. They put him in cost.
To conduct the experiment, nevertheless, they wanted the 50-foot magnet racetrack from Brookhaven. And so in 2013, the magnet went on a 3,200-mile odyssey, principally by barge, down the Japanese Seaboard, round Florida and up the Mississippi River, then by truck throughout Illinois to Batavia, house of Fermilab.
The magnet resembled a flying saucer, and it drew consideration because it was pushed south throughout Lengthy Island at 10 miles per hour. “I walked alongside and talked to individuals about the science we had been doing,” Dr. Polly wrote. “It stayed over one night time in a Costco parking zone. Effectively over a thousand individuals got here out to see it and listen to about the science.”
The experiment began up in 2018 with a extra intense muon beam and the purpose of compiling 20 instances as a lot knowledge as the Brookhaven model.
In the meantime, in 2020, a bunch of 170 specialists referred to as the Muon g-2 Principle Initiative revealed a brand new consensus worth of the theoretical worth of the muon’s magnetic second, primarily based on three years of workshops and calculations utilizing the Customary Mannequin. That reply bolstered the unique discrepancy reported by Brookhaven.
Reached by telephone on Monday two days earlier than the announcement, Aida X. El-Khadra, a physicist at the College of Illinois and a co-chair of the Muon g-2 Principle Initiative, stated that they had been ready for this end result for a very long time.
“I’ve not had the feeling of sitting on scorching coals earlier than,” she stated.
On the day of the Fermilab announcement one other group, utilizing a special approach referred to as a lattice calculation to compute the muon’s magnetic second, obtained a special reply than Dr. El-Khadra’s group, including a brand new notice of uncertainty to the proceedings.
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