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. Adrich et al., Eur. Phys. J. C 83, 1004 (2023).
SPP physicists are at the origin of the GBAR project.
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. Since 2012, a fifth telescope of 28 m-diameter completes the network (H.E.S.S.-2). H.E.S.S. observations have allowed the discovery of more than a hundred gamma ray sources.
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). ATLAS has recorded proton-proton collision data at 7 TeV center-of-mass energy in 2010 and 2011, then at 8 TeV in 2012 (Run 1). The Higgs boson discovery was announced at CERN in July 2012. The Run 2 of the LHC, which started in 2015 at 13 TeV energy, is on going until end of 2018.
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). CMS has recorded proton-proton collision data at 7 TeV center-of-mass energy in 2010 and 2011, then at 8 TeV in 2012 (Run 1). The Higgs boson discovery was announced at CERN in July 2012. The Run 2 of the LHC, which started in 2015 at 13 TeV energy, is on going until end of 2018.
T2K, WA105, DUNE, HyperK, Lumineu
The T2K Collaboration gathers about 500 physicists from 59 institutes in 11 countries. T2K is a longue-baseline off-axis neutrino experiment for the study of neutrino oscillations using a beam of muonic neutrinos produced at the J-PARC Japanese facility, and measured at short distance (280 m) by the ND280 detectors and at large distance (295 km) by the Super Kamiokande water-Cherenkov detector. The data taking started in 2009 and will extend until 2020.
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.
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.
The ILC is a linear electron-positron collider located in Japan, whose physics programme spans several decades, starting around 2030.
CaLIPSO, QUYOS
CaLIPSO is a medical imaging project aiming at a breakthrough in high-spatial-resolution Positron Emission Tomography (PET). The CaLIPSO concept for the detection of 511 keV gamma rays is based on the precise 3D localisation of the photoelectron in an organometallic liquid, associated with ultra fast electronics. This detector R&D activity is on-going at IRFU since 2009, with very promising results.
Double Chooz, Nucifer, CeSOX
The Double-Chooz collaboration gathers about 160 physicists and engineers from 38 Institutes in 8 countries. Located next to the Chooz nuclear plant in the French Ardennes, the experiment is designed to study neutrino oscillations from the flux of electronic antineutrinos emitted from the two nuclear reactors of the plant. Compared to previous generation reactor neutrino experiments, Double-Chooz uses two detectors rather than one, in order to reduce normalisation uncertainties.
