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Working at the forefront of particle physics, SLAC scientists use powerful particle accelerators to create and study nature’s fundamental building blocks and forces, build sensitive detectors to search for new particles and develop theories that explain and guide experiments. SLAC's particle physicists want to understand our universe – from its smallest constituents to its largest structures.

Related links:
Physics of the universe
Elementary particle physics

Particles collide in this illustration

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VIA Symmetry Magazine

The 12 Days of Physicsmas

Add some science to your holiday carols.

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VIA Symmetry Magazine

Symmetry: Machine Evolution

Planning the next big science machine requires consideration of both the current landscape and the distant future.

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VIA Symmetry Magazine

LHC Data: How It’s Made

In the Large Hadron Collider, protons become new particles, which become energy and light, which become data.

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The prestigious award recognizes her seminal contributions to particle physics.

Helen Quinn
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Analysis of data from the BaBar experiment rules out theorized particle’s explanation for muon mystery.

BaBar experiment detector
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VIA Symmetry Magazine

Something Borrowed

SLAC engineer Knut Skarpaas designs some of physics’ most challenging machines, finding inspiration in unexpected places.

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Around the world, scientists and non-scientists alike celebrated the first international Dark Matter Day.

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VIA Symmetry Magazine

What is a Cross Section?

Cross sections tell physicists how likely particles are to interact in a given way.

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He is recognized for his numerous contributions to the advancement of accelerator physics, community service and education.

Alexander Chao
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VIA Symmetry Magazine

A Play in Parallel Universes

Constellations illustrates the many-worlds interpretation of quantum mechanics—with a love story.

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System tests at SLAC continue with 32 light sensors - up from a single one - in a small-scale version of the future experiment...

LZ PMT Array
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The summer school explored upcoming opportunities to expand our understanding of the universe and its fundamental physics, from mysterious dark matter to recently detected...

2017 SSI Group Photo