- Scientists at the US particle accelerator facility Fermilab have found potential evidence that sub-atomic particles, called muons, are behaving differently than expected based on the current theory of sub-atomic physics, suggesting that a fifth force of nature — separate from gravity, electromagnetism, the strong force, or the weak force — could be at play. BBC News (LR: 3 CP: 5)
- The researchers sent the muons, which are similar to electrons but 207 times the size, around a 46-foot magnetized ring at Fermilab. The experiment revealed that the particles wobbled in uncharacteristic ways than what is expected under the “Standard Model” of how particles interact. Futurism
- For 50 years, scientists have been able to predict the behavior of sub-particles — which make up atoms — perfectly, with no errors. Everything in the world is made of atoms. BBC News (LR: 3 CP: 5)
- However, the research, published in the journal Physical Review Letters, cannot be officially claimed as a new physics discovery, as there’s still a one in 40K chance that it’s incorrect. Fermilab scientist Chris Polly also said that only 6% of the data collected has been analyzed to date. Futurism
- Scientists believe in a fifth force for several reasons, including how galaxies are continuing to accelerate apart after the Big Bang theory rather than slowing down, and how they’re spinning faster than they should, considering how much material is known to be in them. This is believed to be due to invisible particles known as dark matter, which aren’t part of the Standard Model. BBC News (LR: 3 CP: 5)
Narrative A:
- While many physicists agree that there are more forces of nature out there, especially regarding dark matter, we shouldn’t let news like this get our hopes too high. Groups of researchers have claimed to have discovered the fifth force for decades now, all of which were eventually debunked. Science is, of course, about trial and error, but the evidence has to be unequivocally clear before such claims can be made.
Astronomy Magazine
Narrative B:
- Though researchers are still stuck at the 1 in 40K chance of being wrong, they have consistently seen this unpredictable wobbling for over two years now. There is more work to be done, but we should all be excited as the Fermilab grows closer and closer to officially discovering a fifth force of nature.
BBC News (LR: 3 CP: 5)
Nerd narrative:
- There’s a 51% chance that we will know what dark matter is before 2050, according to the Metaculus prediction community.
Metaculus (LR: 3 CP: 3)
2023 August 10
“Muon g-2 doubles down with latest measurement, explores uncharted territory in search of new physics”
Press release, FermilabThe difference of g from 2 — or g minus 2 — can be attributed to the muon’s interactions with particles in a quantum foam that surrounds it. These particles blink in and out of existence and, like subatomic “dance partners,” grab the muon’s “hand” and change the way the muon interacts with the magnetic field. The Standard Model incorporates all known “dance partner” particles and predicts how the quantum foam changes g. But there might be more. Physicists are excited about the possible existence of as-yet-undiscovered particles that contribute to the value of g-2 — and would open the window to exploring new physics.
The new experimental result, based on the first three years of data, announced by the Muon g-2 collaboration is: g-2 = 0.00233184110 +/- 0.00000000043 (stat.) +/- 0.00000000019 (syst.)
2020 june 11 results :
(exp 2020)
The most precise experimental result available (in 2020)
so faris:a = (g-2)/2 (muon, expmt) = 116 592 089(63) x 10-11
So… g-2(exp. in 2020) = 0.002331842
The theoretical value of the anomalous magnetic moment of the muon, published today, is:
a = (g-2)/2 (muon, theory) = 116 591 810(43) x 10-11
So… g-2(theorical) = 0.002331836So… exp(2023) - theorical(2020) = 0.00233184110 - 0.002331836
= 0.000 000 005 1 ± 0.000 000 000 43(stat)So… signal/noise = 510/43 …looks good… But now the theorical(2020) value is challenged :
Calculating the Standard Model prediction for muon g-2 is very challenging. In 2020, the Muon g-2 Theory Initiative announced the best Standard Model prediction for muon g-2 available at that time. But a new experimental measurement of the data that feeds into the prediction and a new calculation based on a different theoretical approach — lattice gauge theory — are in tension with the 2020 calculation.
Considering the whole dark energy and dark matter thing it has seemed obvious to me for years that there are other forces of our universe or other dimensions we cannot perceive that interact with us on the daily but we simply cannot see them because of the matter we are made of and the forces that apply the strongest to us. But I’m glad they are looking to investigate further, now that they have a starting point on what to observe to start doing studies and creating theories.
