Meanwhile, a group of 170 experts known as the Muon g-2 Theory Initiative published in 2020 a new consensus value of the theoretical value of the magnetic moment of muon, based on three years of workshops and calculations using the standard model. That response reinforced the original difference Brookhaven reported.
Aida X. El-Khardra, a physicist at the University of Illinois and co-chair of the Muon g-2 Theory Initiative, reached by telephone on Monday, saying she did not know the result that Fermilab would announce two days later – and she did not want to, so she would not be tempted to wallow in a lecture scheduled just before the official unveiling on Wednesday.
“I have not yet had the feeling of sitting on hot coals,” said dr. El-Khadra said. “We’ve been waiting a long time for this.”
On the day of the Fermilab announcement, another group, using a different technique known as a grid calculation, used to calculate the magnetic moment of the muon, that there was no difference between the Brookhaven measurement and the Standard Model.
“Yes, we claim that there is no contradiction between the standard model and the Brookhaven result, no new physics,” said Zoltan Fodor of Pennsylvania State University, one of the authors of a report published in Nature on Wednesday. .
Dr. El-Khadra, who was familiar with the work, called it a “wonderful calculation, but not conclusive.” She noted that the calculations involved were terribly complicated, and that they had to take into account all possible ways in which a monk could communicate with the universe, and required thousands of individual sub-calculations and hundreds of hours of supercomputer time.
According to her, these grid calculations should be checked against independent results of other groups to rule out the possibility of systematic errors. For now, the calculation of the Theory Initiative remains the standard by which the measurements are compared.