News

News

LHC delivers a record number of particle collisions in 2025

All experiments broke records in the final full operating year of the third run of the LHC

News
Accelerators
09 December, 2025
Accelerators
News
09 December, 2025

Service availability during CERN’s annual closure 2025/2026

Official news
At CERN
09 December, 2025
At CERN
Official news
09 December, 2025

Official holidays in 2026 and end-of-year closure 2026/2027

(In accordance with Articles R II 4.38 and R II 4.39 of the Staff Regulations)

Official news
At CERN
04 December, 2025
At CERN
Official news
04 December, 2025

Extension of the pre-retirement programmes

Official news
At CERN
04 December, 2025
At CERN
Official news
04 December, 2025

Deciphering the heavyweights of the tetraquark world

The CMS collaboration reports the first measurement of the quantum properties of a family of tetraquarks that was recently discovered at the LHC

News
Physics
03 December, 2025

Annual test of diesel generators on 16 December

Announcement
At CERN
03 December, 2025
At CERN
Announcement
03 December, 2025

Burglary and thefts in public places prevention campaign

Official news
At CERN
02 December, 2025
At CERN
Official news
02 December, 2025

Send a CERN e-card

Send colleagues, family and friends season’s greetings using the CERN e-card service

Announcement
At CERN
28 November, 2025
At CERN
Announcement
28 November, 2025