see url: https://phys.org/news/2021-04-hints-particles-nature-physics.html
see full report...The whole world is full of spin these days, even at
the sub-atomic level, as well as at the macro level...😉 Even magnetic
forces are either attractive or repellent...😉
Quote<<<
Seven years ago, a huge magnet was transported over 3,200 miles
(5,150km) across land and sea, in the hope of studying a subatomic
particle called a muon.
Muons are closely related to electrons, which orbit every atom and form
the building blocks of matter. The electron and muon both have
properties precisely predicted by our current best scientific theory
describing the subatomic, quantum world, the standard model of particle
physics.
A whole generation of scientists have dedicated themselves to measuring
these properties in exquisite detail. In 2001, an experiment hinted that
one property of the muon was not exactly as the standard model
predicted, but new studies were needed to confirm. Physicists moved part
of the experiment to a new accelerator, at Fermilab, and started taking
more data.
A new measurement has now confirmed the initial result. This means new
particles or forces may exist that aren't accounted for in the standard
model. If this is the case, the laws of physics will have to be revised
and no one knows where that may lead.
This latest result comes from an international collaboration, of which
we are both a part. Our team has been using particle accelerators to
measure a property called the magnetic moment of the muon.
Each muon behaves like a tiny bar magnet when exposed to a magnetic
field, an effect called the magnetic moment. Muons also have an
intrinsic property called "spin," and the relation between the spin and
the magnetic moment of the muon is known as the g-factor. The "g" of the
electron and muon is predicted to be two, so g minus two (g-2) should be
measured to be zero. This is what's we're testing at Fermilab.
For these tests, scientists have used accelerators, the same kind of
technology Cern uses at the LHC. The Fermilab accelerator produces muons
in very large quantities and measures, very precisely, how they interact
with a magnetic field.
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