Gluon

Imagine that you wanted to know what the matter around you was made of, at a fundamental level. How would you go about figuring out the answer? You might think to approach the problem by taking a…

Physicists with the ALICE Collaboration at CERN's Large Hadron Collider (LHC) have seen the first ever evidence of antihyperhelium-4, which is composed of two antiprotons, an antineutron and an antilambda.

Physicists at Brookhaven Lab have found a new way to use data from high-energy particle smashups to peer inside protons.

Top-quark pair production has been observed in lead-lead collisions at CERN's Large Hadron Collider (LHC) with the ATLAS detector, marking the first observation of this process in interactions between atomic nuclei.

The world's largest and most powerful particle accelerator may be producing the world's tiniest droplets of liquid, right under scientists' noses. Researchers are digging into this subatomic enigma.

One of the great mysteries in all the Universe is the question of what, exactly, makes it all up? The science of experimental particle physics revealed an incredible part of that story, discovering…

MIT Associate Professor Or Hen probes the interactions between protons and neutrons, and their even smaller constituents of quarks and gluons. He investigates how these particles' interactions shape the visible universe and extreme astrophysical phenomena such as neutron stars.

Scientists studying the earliest black holes may have found an answer to dark matter, putting Stephen Hawking's theory on the subject back into the spotlight...

8 basic unanswered questions about the known particles. It's 2024, and we still only know of the fundamental particles of the Standard Model: nothing more. But these 8 unanswered questions….

In the first quintillionth of a second, the universe may have sprouted microscopic black holes with enormous amounts of nuclear charge, MIT physicists propose. The gravitational pull from these tiny, invisible objects could potentially explain all the dark matter that we can't see today.

Things happen fast in the earliest stages of the Universe. In the first 25 microseconds after the start of the hot Big Bang, a number of incredible events have already occurred. The Universe created…

Amaterasu—the most powerful cosmic ray seen in three decades—seems to come from an empty point of the sky. New telescopes may solve the mystery of its origins

Valve is celebrating the 25th anniversary of Half-Life by releasing a documentary, a major update for the game, as [...]

There's an important rule in relativity that — as far as we know — all objects must obey. If you have no rest mass as you travel through the vacuum of space, you absolutely are compelled to travel…

The initial phases of heavy-ion collisions occurring at the maximum energies available at the CERN Large Hadron Collider continue to remain an enigma of modern nuclear physics. New theoretical tools improved by physicists from the Institute of Nuclear Physics of the Polish Academy of Sciences in Cracow will help to unlock this mystery.

Aurélien Barrau reviews the recent disappointing results from the Large Hadron Collider. Without any sign of new physics, without any confirmation of popular theories such as supersymmetry, the field needs to be fundamentally reconsidered.

What's really happening here?

The start of this year's physics run at the Relativistic Heavy Ion Collider (RHIC) also marks the start of a new era. For the first time since RHIC began operating at the U.S. Department of Energy's Brookhaven National Laboratory in 2000, a brand new detector will track what happens when the nuclei of gold atoms smash into one another at nearly the speed of light. That new detector, sPHENIX, has been a decade in…

How "bound together" is our Universe?. From quarks and gluons to giant galaxy clusters, everything that exists in our Universe is determined by what is (and isn't) bound….

The universe began about 14 billion years ago with a single point that contained a vast array of fundamental particles, according to the prevailing theory known as the Big Bang. Under the pressure of extreme heat and energy, the point inflated and then expanded to become the universe as we know it. That expansion continues to this day.