At Fermilab, a brand new campus dedicated to learning muons was being constructed.
“That opened up a world of chance,” 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 folks concerning the science we have been doing,” Dr. Polly wrote. “It stayed over one evening in a Costco car parking zone. Effectively over a thousand folks got here out to see it and listen to concerning 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 because the Brookhaven model.
In the meantime, in 2020, a gaggle of 170 specialists often known as the Muon g-2 Idea Initiative revealed a new consensus value of the theoretical value of the muon’s magnetic moment, primarily based on three years of workshops and calculations utilizing the Normal 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 on the College of Illinois and a co-chair of the Muon g-2 Idea Initiative, stated they’d been ready for this outcome for a very long time.
“I’ve not had the sensation of sitting on scorching coals earlier than,” she stated.
On the day of the Fermilab announcement one other group, utilizing a distinct method often known as a lattice calculation to compute the muon’s magnetic second, received a distinct reply than Dr. El-Khadra’s group, including a brand new be aware of uncertainty to the proceedings.