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Curiouser and curiouser: a riddle at the ALICE detector

12/09/25

Sarah Charley

In 2023, the ALICE experiment was ready for their best year yet, until a mysterious signal threatened everything. As the LHC wraps up its 2025 lead-ion run, physicists recall how they worked together to solve the puzzle.

12/01/07

Spartan software

Every time Fermilab scientist Tom Schwarz starts up SpartyJet, he inwardly grimaces. The computer program works well. It does a fine job of finding and recording jets—sprays of subatomic particles that emerge from collisions involving protons.

12/01/07

Entering Higgs habitat

A powerful new collider will allow scientists to explore the territory where the long-sought Higgs particle—maybe even a whole family of them—resides.

12/01/07

Connecting with Africa

ATLAS, a particle physics experiment at CERN’s Large Hadron Collider, boasts 2000-plus members from 35 countries. But on a map showing where those members come from, one continent is almost mark-free: Africa.

Simulation showing a spray of particles created in a particle collision

12/01/07

Protecting the LHC from itself

Scientists at CERN have crafted the world’s most sophisticated machine protection system to save the LHC from itself.

12/01/07

The LHC by mail

Each year the European laboratory CERN welcomes tens of thousands of visitors. Now the lab can visit them back.

11/01/07

Dark energy

In the fall of 1997, I was leading the calibration and analysis of data gathered by the High-z Supernova Search Team, one of two teams of scientists the other was the Supernova Cosmology Projecttrying to determine the fate of our universe: Will it expand forever, or will it halt and contract, r

11/01/07

DUSEL mine tour

In March 2007, members of a US National Science Foundation panel went on a whirlwind bus tour of potential sites for the Deep Underground Science and Engineering Laboratory. Here's an account of that trip by Peter Fisher of the Massachusetts Institute of Technology.

11/01/07

Free for all

The next big experiment in particle physics won’t need an accelerator, detector, or other big machine. It doesn’t even involve subatomic particles—unless you count the electrons that flow through electronic circuits, carrying bits of information from one human brain to the next.

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