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Particle Physics
From forming bound states to normal scattering, many possibilities abound for matter-antimatter interactions. So why do they annihilate?
It's 2024, and we still only know of the fundamental particles of the Standard Model: nothing more. But these 8 unanswered questions remain.
Predicted way back in the 1960s, the discovery of the Higgs boson in 2012 completed the Standard Model. Here's why it remains fascinating.
CERN's Large Hadron Collider is the most powerful particle accelerator ever. To go even further, we'll have to overcome something big.
With new W-boson, top quark, and Higgs boson measurements, the LHC contradicts earlier Fermilab results. The Standard Model still holds.
IceCube scientists have detected high-energy tau neutrinos from deep space, suggesting that neutrino transformations occur not only in lab experiments but also over cosmic distances.
Glueballs are an unusual, unconfirmed Standard Model prediction, suggesting bound states of gluons alone exist. We just found our first one.
From the earliest stages of the hot Big Bang (and even before) to our dark energy-dominated present, how and when did the Universe grow up?
At a fundamental level, only a few particles and forces govern all of reality. How do their combinations create human consciousness?
Our Universe requires dark matter in order to make sense of things, astrophysically. Could massive photons do the trick?
Practically all of the matter we see and interact with is made of atoms, which are mostly empty space. Then why is reality so... solid?
If the electromagnetic and weak forces unify to make the electroweak force, maybe, at higher energies, something even grander happens?
In all the Universe, only a few particles are eternally stable. The photon, the quantum of light, has an infinite lifetime. Or does it?
No matter how good our measurement devices get, certain quantum properties always possess an inherent uncertainty. Can we figure out why?
There are so many problems, all across planet Earth, that harm and threaten humanity. Why invest in researching the Universe?
Lord Kelvin is thought to have said there was nothing new to discover in physics. His real view was the opposite.
In the infant Universe, particle physics reigned supreme.
First derived by Emmy Noether, for every symmetry a theory possesses, there's an associated conserved quantity. Here's the profound link.
A great many cosmic puzzles still remain unsolved. By embracing a broad and varied approach, particle physics heads toward a bright future.
You can only create or destroy matter by creating or destroying equal amounts of antimatter. So how did we become a matter-rich Universe?
Symmetries aren't just about folding or rotating a piece of paper, but have a profound array of applications when it comes to physics.
Discrepancies between observations and theory regarding subatomic particles called muons may force scientists to rethink the quantum world.
The $21.5-billion project could involve tunneling hundreds of feet under Lake Geneva.
Recent measurements of CERN data seem to disagree with standard-model predictions about how the Higgs boson decays, though further analysis is needed to confirm the observations.
The DUNE project will beam tiny neutrinos across vast distances. But the first step involved moving a heavier material: 1 million tons of rock.
For every proton, there were over a billion others that annihilated away with an antimatter counterpart. So where did all that energy go?
Wolfgang Pauli was a brilliant, well-liked physicist and a scathing critic of balderdash.
Physicists have yet to pinpoint the hypothetical matter that keeps galaxies from flying apart. Now they have a new focus.
In our Universe, matter is made of particles, while antimatter is made of antiparticles. But sometimes, the physical lines get real blurry.
U.S. particle physicists recently recommended a list of major research projects that they hope will receive federal funding.