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European Laboratory for Particle Physics

At CERN, scientists from around the world use unique machines to explore how the Universe works, pushing the limits of technology for the benefit of society.

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In the wake of partons

The CMS Collaboration reports the first direct observation of a “wake” formed by a parton travelling through quark–gluon plasma

Construction begins on massive underground neutrino experiment

Nearly 1.5 km underground in South Dakota, scientists are building a world-leading experiment to study neutrinos and investigate some of the Universe’s greatest mysteries

LHCb finds evidence of one-in-ten-billion particle decay

If confirmed, this would be the rarest beauty-particle decay ever observed

In the wake of partons

The CMS Collaboration reports the first direct observation of a “wake” formed by a parton travelling through quark–gluon plasma

Construction begins on massive underground neutrino experiment

Nearly 1.5 km underground in South Dakota, scientists are building a world-leading experiment to study neutrinos and investigate some of the Universe’s greatest mysteries

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Physics
Accelerators
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What’s going on at CERN?

As of mid-2026, CERN’s accelerator complex and experiment facilities are undergoing major maintenance and upgrade work. This phase, known as Long Shutdown 3, involves thousands of experts from many different disciplines.

The work centres on transforming the LHC into a high-luminosity machine, the HiLumi LHC. Most of the other accelerators and experimental facilities are being upgraded as well.

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Accelerating science

IN PREPARATION

HiLumi LHC

The High-Luminosity Large Hadron Collider will increase by a factor of ten the number of particle collisions (called “luminosity”), vastly increasing the volume of physics data available for researchers.

This leap forward will allow physicists to explore the behaviour of the Higgs boson and other elementary particles with unprecedented precision, increasing the potential for discoveries after 2030.

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LOOKING TO THE FUTURE

Future Circular Collider

The Future Circular Collider could be Europe’s next-generation particle collider: a unique tool to explore the deepest mysteries of the Universe and to drive technology, innovation and skills for decades to come. 

This new collider would help answer many questions about nature’s rulebook that lie beyond the reach of current colliders.

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Key achievements

Higgs boson

Discovered in 2012 by the ATLAS and CMS experiments at the Large Hadron Collider (LHC), the Higgs boson confirms the Higgs mechanism, which explains how elementary particles acquire mass through interaction with the Higgs field.

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Large Hadron Collider

The 27-kilometre LHC, the world’s largest particle accelerator, first started in 2008. It collides protons or lead ions at energies approaching the speed of light.

Learn more about this accelerator at our LHC topic page
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Antimatter

CERN operates the world’s only dedicated antimatter facility, producing the first anti-atoms in 1995 and later trapping and transporting antimatter.

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Birth of the Web

In 1989, CERN computer scientist Tim Berners-Lee invented the World Wide Web to enable efficient sharing of research data among scientists around the globe.

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Neutral currents

Observed at CERN in 1973, via the Gargamelle bubble chamber, and provided the first evidence of the weak neutral force.

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W bosons

Discovered at CERN in 1983, the W boson carries the weak force. It can change the character of particles of matter – allowing the Sun to burn and new elements to form.

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Z bosons

Discovered at CERN in 1983, the Z boson is a neutral elementary particle that, along with its electrically charged cousin, the W boson, carries the weak force.

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