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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

Life among the physics tribes

Meeting in CERN’s Restaurant 1, anthropologist Arpita Roy of the University of California, Berkeley is quick to declare that she will not be having any more coffee today. She has begun drinking multiple cups per day as she meets with CERN physicists to learn about their work.

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

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.

12/01/07

Across the ocean, yet close to home

Among the 10,000 people from around the world who are working on the Large Hadron Collider, 1000 hail from universities and national labs in the United States.

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

Jets

A jet forms when a quark or gluon is produced in a high-energy particle collision.

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.

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