Is There One All Powerful Superforce Controlling The Universe?
TRANSCRIPTION COMPLÈTE
our understanding of the universe
is a house of cards
built high upon a scaffold of
pre-existing theories
and tentative one-off results
and so most experiments in modern
theoretical cosmology
are not as they were in the early days
of physics
they are not voyages of blind discovery
but rather
finely tuned confirmations of
predictions already made
of results already hinted
the higgs boson was first predicted in
1964
and finally confirmed in 2013
just as expected but what scientists
really hope for
are surprises a result that topples the
house of cards and builds a new one in
its place
or totally cements the linkages and
proves the theories
once and for all
[Music]
and so in early 2021 in a laboratory
near chicago
200 virtually assembled scientists
shared a gasp of excitement
had just such a result the experiment
and analysis was the culmination of more
than 60 years work
involving physicists from 35
institutions in seven countries
worldwide
and yet until an envelope was opened in
batavia illinois
and a secretive key typed into a
computer not one of them
really knew what they had accomplished
this elaborate cloak and dagger approach
to experimental physics perhaps more
suited to a star-studded film festival
was necessary to avoid any one of the
hundreds of collaborators inadvertently
biasing their findings towards the
desired outcome
[Music]
this latest experiment at ferma lab was
concerned with the behavior
of muons these exotic particles are the
heavier cousins of the electrons
and exist only for a couple of
microseconds before decaying into
something else
like an electron a muon has electric
charge and behaves like a spinning
magnet
but that spin wobbles when muons move
through a magnetic field
so using the incredibly complex
mathematical tools of quantum mechanics
and the so-called standard model of
particle physics
scientists have predicted exactly how
much the muons
should wobble this theoretical
prediction represents the sum
of what we think we know about how the
universe works
and the elaborate experiment at ferma
lab was designed to test
this theory to find out if we
are right
[Music]
to do this researchers spent four years
installing and calibrating a huge
c-shaped magnet some 15 meters in
diameter with an impeccably uniform
magnetic field
for more than a year they spared muons
around the magnet
and measured their wobble
[Music]
and sitting at the controls of this
machine waiting
for the beam to fire our researchers
would have had plenty of time
to contemplate the theoretical house of
cards
on which their predictions were built
all matter in the universe from the
muons inside the magnet
to the researchers themselves is subject
to four fundamental irreducible forces
gravity keeps the scientist pinned to
the seat of her chair
keeps the huge magnet stuck to the
surface of the earth
and keeps the earth in orbit around the
sun
electromagnetism provides the invisible
pull within the gigantic magnet
but it does more than that it is
responsible for the electric currents
that flow through the equipment's
controls
and for the electrical impulses that
spark through the scientist's body
to keep her heart beating and her
neurons firing
shrinking down further to the scale of
atoms themselves
the strong nuclear force grips the
particles together in every atomic
nucleus
holding them fast despite the repulsion
of their like charges
without this force not a single atom in
her body
the room or the entire universe could
exist
they would simply fly apart in a cloud
of unconnected quarks
and yet in a few thousand atoms inside
the scientist's body
the weak nuclear force is driving such
elemental destruction
the fourth fundamental force is the
agent of radioactive decay
which sees atomic nuclei like the
potassium 40 inside our cells
cracked open and transformed together
the actions of the four fundamental
forces gravity electromagnetism and the
strong and weak nuclear forces are
enough to describe
every single phenomenon in the universe
today
except for it seems the wobble
of muons the revelation unlocked with
the opening of thermolab's envelope
was that the intricate predictions built
on these four forces for the muons
were not in fact correct
muons wobble more than they should and
the results
showed with unprecedented precision that
there is likely
to be something else at play a fifth
force
as yet undiscovered there is still much
work to be done to understand the
significance of this curious
muon wobble but it gives us cause to
re-examine what we think we know about
the four
fundamental forces that we are aware of
our understanding of them too the result
of centuries of scientific revelation
why
are they fundamental to the universe and
are they really
as distinct as we think how
did the directionless quantum foam at
the beginning of our universe give birth
to these
fundamental natural laws
extending our house of cards back to the
very
birth of the cosmos we find
that things looked very different for a
brief moment
of grand unification
[Music]
the existence of invisible forces at
play in our universe
has been recognized for thousands of
years and mankind has strived to
understand and harness them
for almost as long load stones pieces of
naturally magnetic rock
were treasured and used for divination
by the chinese since the second century
ancient egyptians were wary of shocks
from electric fish
and early philosophers experimented with
static electricity
with rods of amber rubbed on cats fur
but these strange phenomena graduated
from mere curiosities
in the 17th and 18th centuries as the
scientific revolution
forced them to yield their secrets they
became the subject of rigorous study
by scholars and statesmen alike founding
father benjamin franklin reputedly sold
all his possessions in order to fund his
research
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