By Sabbatum evening, I got sufficiently surely that the papers are apparently incorrect too the termination must survive zero. The text below was written good earlier this convergence of my views.
As yous know really well, the electron magnetic minute \(\vec \mu\) is proportional to the electron's spin \(\vec S\):\[
\Delta due east = -\vec \mu\cdot \vec B,\quad
\vec \mu = g \frac{e}{2m}\vec S.
\] Simple first-quantized Dirac equation tells yous that \(g=-2\): the Dirac magnetic minute is twice equally strong equally what yous would hold off from a spinning classical gyroscope of the same volume whose electrical flow creates the magnetic land equally coils do. In quantum electrodynamics, at that topographic point are loop corrections too the value of \(g\) measured past times my ex-colleague Gerry Gabrielse is\[
g_e\approx –2.00231930436182(52).
\] The accuracy is roughly xiii decimal points. All these xiii digits are predicted past times theory – which needs upwards to five-loop diagrams (it's roughly ability police expansion involving powers of the fine construction constant \(\alpha\approx 1/137.036\)) – too all these xiii theoretical digits perfectly gibe Gabrielse's experiment.
By this agreement, the ageing too dwindling field of physics maintains the most accurate experimentally verified prediction inwards all of science. Well, roughly of the other, to a greater extent than dynamic disciplines of scientific discipline alone verify 1 or ii figures too sometimes less than that (e.g. inwards the representative of the most cited scholar, Moravian Jewish High German Sigmund Freud who didn't actually know what a digit was). ;-)
The same Dirac equation too QED should apply to electron's heavier siblings, muons too tau leptons, too. Tau is besides unstable etc. only it's interesting to human face at the measured value for the muon,\[
g_\mu \approx -2.0023318418(13).
\] It's naively the same value equally the electron's value except that roughly special, flavor-sensitive loop diagrams affair too so it's non quite the same.
You regard that the position out of pregnant figures is lower than inwards the electron's case. Moreover, despite this significantly larger fault margin, the experiments' understanding amongst theory is less impressive. There has been roughly tantalizing 3.6-sigma disagreement. It's been argumentatively exploited equally a weak hint of roughly novel physics beyond the Standard Model.
In recent days, 3 Japanese authors, Takahiro Morishima, Toshifumi Futamase, too (in 2/3 of the papers) Hirohiko M. Shimizu released 3 articles:
Japan 1, Japan 2, Japan 3which claim that the 3.6-sigma anomaly is removed because roughly neglected term inwards the theoretical prediction has been identified, computed, too corrected.
The neglected term is due to an object yous must convey encountered inwards your life. It's blue, non green. And despite the environmentalists' misinformation near the coloring too their deceitful claims that at that topographic point is no Planet B, at that topographic point be tons of alternatives to that object (e.g. those discovered past times the Kepler mission). What is it? Yes, it's Planet Earth. And its gravity.
These Japanese physicists say that gravity does influence the magnetic moments a priori, only for the electron, the previous calculations convey been basically done inwards such a fashion that it's consistent to fail the Earth's gravitational contribution. Other things convey been gauged too so that the public doesn't matter.
But when yous produce it, yous tin no longer fail the gravitational termination for the heavier particle, the muon. Correct the occupation and... if they are right, the 3.6-sigma anomaly goes away.
I was busy today too my unloose energy is express similar a shot (probably below the degree of the laziness) only I promise to intend near their declaration later. If they're right, the lesson for theorists is simple: During your of import calculations, don't forget yous alive on public too at that topographic point are clouds too the Lord's Day inwards a higher house yous – too sometimes, don't fifty-fifty forget the Luna which is sometimes inwards a higher house yous too sometimes below the horizon, equally the brain-dead Bitcoin hodlers are learning inwards the difficult fashion these days. ;-)
Tommaso Dorigo wrote roughly other pop text near the papers.