The Particle Physics Division

GBAR

The GBAR Collaboration gathers around 50 members from 17 Institutes, with the goal of measuring the acceleration of hydrogen antiatoms in the Earth gravitational field. The experiment has been installed at CERN at the AD-ELENA ring. It produced its first antihydrogen beam in 2022: P.

Astroparticles

H.E.S.S., CTA, Antares, Edelweiss

The H.E.S.S. Collaboration gathers more than 170 scientists from 32 institutes of 12 countries. Four 12 m-telescopes, installed since 2002 in Namibia, are in operation to observe Cherenkov light produced by interaction of high-energy gamma rays with the upper atmosphere.

ATLAS

The ATLAS Collaboration gathers close to 3,000 physicists, from 174 institutes in 38 countries. ATLAS is one of the two general-purpose experiments at the CERN Large Hadron Collider (LHC).

CMS

The CMS Collaboration gathers close to 2,500 physicists, from 180 institutes in 43 countries. CMS is one of the two general-purpose experiments at the CERN Large Hadron Collider (LHC).

Colliders neutrinos

T2K, WA105, DUNE, HyperK, Lumineu

The T2K Collaboration gathers about 500 physicists from 59 institutes in 11 countries.

Cosmology

Planck, SNLS, BOSS, eBOSS, DESI

Physicists of the SPP Cosmology group use several cosmological probes to constrain the energy content of the Universe: the baryon acoustic oscillation (BAO), with participation to the BOSS, eBOSS, and DESI experiments ; type 1A supernovae within the SNLS experiment ; and galaxy clusters with the data of the Planck satellite.

Detectors development

RD51, ILC/ILD, FCC

The International Linear Collider (ILC) is one of the collider projects envisioned as the next large machine for particle physics, and the in-depth study of the electroweak symmetry breaking sector.

Health and energy

CaLIPSO, QUYOS

CaLIPSO is a medical imaging project aiming at a breakthrough in high-spatial-resolution Positron Emission Tomography (PET).

Sources and reactors neutrinos

Double Chooz, Nucifer, CeSOX

The Double-Chooz collaboration gathers about 160 physicists and engineers from 38 Institutes in 8 countries.

Particle Physics Division

Institute of Research into the Fundamental Laws of the Universe