The Particle Physics Division


The department of particle physics is interested in five topics: the physics of colliders, neutrinos but also low energy interactions, cosmic phenomena of high energy, astroparticles and the dark Universe. In collaboration with the other departments of the institute, the DPhP participates in the development of experiments like the LHC and Double Chooz, analyzes the data produced by international collaborations like H.E.S.S. or eBOSS allowing thanks to the collected data to validate theoretical models such as for example the model of general relativity used in cosmology. DPhP is thus participating in the new era of astrophysics, that of multi-messengers. Strong skills in simulation and modeling enable the DPhP to participate in major programs simulating the evolution of the Universe.

The DPhP also explores innovative experimental concepts for its own themes by contributing to detector developments with future accelerators such as improvements to the LHC in collaboration with other departments of the Institute, or for societal applications, in the areas of health with the Calipso project whose goal is to build a PET detector for medical research and alternative energies like Qyos.


   Access to DPhP's website :


Head of the Particle Physics Division: Gautier Hamel de Monchenault

Deputy-head: Georges Vasseur

Secretary : Martine Oger

#537 - Last update : 05/27 2021
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CP violation (SPP) : In 1964, an asymmetry between matter and anti-matter was discovered in a special context which allows for very accurate measurements. This fi nding is still providing questions and constraints on models. Indeed, it is related to the entire universe (without it, matter and anti-matter would have annihilated at the Big Bang!), and to the microscopic structure (in the Standard Model, it stems from the presence of 3 families of similar particles).
Experimental Physics Above All : DPhP physicists are experimentalists. While designing experiments, they evaluate theoretical ideas, sometimes contribute directly to them, and confront them to the technical possibilities for testing. Then they participate to the detailed design of the detectors, their construction, and operation. Finally, they analyze the experimental data and compare it to the theoretical models considered. The strong link between physicists and technical support in the Institute is an essential asset.
The great questions in particle physics and cosmology : The great questions in particle physics and cosmology   The physicists at the Particle Physics Division are tackling some of the deepest questions in modern particle physics and cosmology.
The Scientific Themes of DPhP : DPhP physicists are involved in a dozen international experiments.


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