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Articles sur Particle physics

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The epoch of the leptons existed for nine seconds after the Big Bang. Big Bang by Shutterstock

Explainer: what are fundamental particles?

Subatomic particles have shaped and continue to shape our universe but despite perfect predictions by physicists, the theory about unseen particles is still wrong.
Look into my high-energy particle physics and what do you see? CERN

Upgraded LHC pushes physics into the unknown

For less than the cost of a single Typhoon jetfighter, the upgraded LHC will push our understanding of physics to the brink.
A 3D artist has dissected the LHC in this composite image, showing a cut-out section of a superconducting dipole magnet. The beam pipes are represented as clear tubes, with counter-rotating proton beams shown in red and blue. Daniel Dominguez/CERN

The LHC is back and it’s ready to probe the limits of matter

The Large Hadron Collider is ramping up to probe even deeper into the fundamental constituents of matter.
And then it falls apart, a bit like this. brookhavenlab

Quirky quark combination creates exotic new particle

Since the spectacular discovery of the Higgs boson in 2012, physicists at the Large Hadron Collider (LHC), the gigantic particle accelerator outside Geneva, have suffered a bit of a drought when it comes…
Move over LHC: the next generation of circular accelerator is being planned. Fotografik33/Flickr

A larger hadron collider? Why bigger is better in particle physics

While the world’s largest circular particle accelerator – the Large Hadron Collider (LHC) – will continue operation for the next few years, scientists have already started the conversation to build a much…
Electricity – just one bright idea to stem from physics. Flickr/JonathanCohen

Physics: a fundamental force for future security

AUSTRALIA 2025: How will science address the challenges of the future? In collaboration with Australia’s chief scientist Ian Chubb, we’re asking how each science discipline will contribute to Australia…
Muons, a type of lepton, are studied at the Large Hadron Collider – but what are they? CERN

Explainer: what are leptons?

The giant Large Hadron Collider at CERN’s lab in Europe may be closed until 2015 but experiments will still be run there in the second half of this year on much smaller synchrotrons that examined the decay…
Dark matter is still a bit of mystery. Fractured Studios

Dark matter experiment finds nothing, makes news

A US team with a highly sensitive dark matter detector has just finished its first run. It has found nothing, and that is still big news. Physicists can explain accurately the behaviour of what makes matter…
A bit too big for your average hospital. Ars Electronica

Explainer: what is proton therapy?

When you stand in the 27km-long Large Hadron Collider tunnel deep under Switzerland and France it looks as if the chain of blue magnets simply stretches off to infinity. So when people talk about putting…
At 31 kilometres long, the International Linear Collider is tipped to be one of the most exciting scientific instruments ever built. But why? ILC GDE

The International Linear Collider is coming – but why do we need it?

While the world’s most powerful particle accelerator - the Large Hadron Collider (LHC) - is on a two-year hiatus for repairs and upgrade, engineers are getting ready to construct the next generation of…
The Large Hadron Collider has temporarily shut down, but will return stronger than ever. CERN

Goodbye, for a while, to the Large Hadron Collider

The lord of the particle accelerator, CERN’s Large Hadron Collider (LHC), went out of particle collision business for almost two years as of late last week. For particle physicists, Valentine’s Day 2013…
The Large Hadron Collider has been used to find out what matter is fundamentally made of, and how the universe was created. EPA/Martial Triezzini

Explainer: quarks

One of humanity’s eternal questions surrounds what we are fundamentally made of. Many ancient philosophies believed in a set of classical elements: from water, air, fire and earth of ancient Greeks; to…
We thought we knew the radius of the proton to within 0.8%. Perhaps not. Ludie Cochrane/Flickr

Updating the textbook: is the radius of a proton wrong?

Striving for agreement between theory and experiment and pushing the boundaries of precision are important parts of the scientific process. With each step in this process we move closer to enlightenment…
When you shine a torch into a dusty room, not all the photons reach their destination. Simon Greig (xrrr)

‘Louder’ light could power a brighter quantum future

All of the light we see around us comes in chunks of energy known as photons. As well as making up light, photons can be used to carry and process information and their quantum properties make possible…
There’s an ongoing push to open the world of academic knowledge to the wider population … for free. Jackman Chiu

Open-access journals: a perspective from within

There’s an ongoing debate in the world of academic publishing about whether the public should be allowed open access to research publications we all pay for in the first place. “If we are paying for this…
“Most people just get used to the concept and get on with their lives.” Roger McLassus

Explainer: what is wave-particle duality

Our notion of reality is built on everyday experiences. But wave-particle duality is so strange that we are forced to re-examine our common conceptions. Wave-particle duality refers to the fundamental…
By smashing together particles at the highest energy readings ever recreated in a laboratory, the Large Hadron Collider, also known as the Big Bang machine, has helped scientists understand the nature of the universe. EPA/Martial Trezzini

Scientists say they have found a Higgs-like particle

Physicists this afternoon announced they have found evidence for a particle considered the biggest missing piece in the standard model of matter, in what is one of the most significant scientific developments…

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