In France, PhD students conduct their research under the supervision of a professor who is affiliated to a doctoral school.
The doctoral schools organize competitions for the PhD fellowships, to which M2 students may participate.
The doctoral schools in the Paris area which overlap high-energy physics are the following:
IP Paris: ED IP Paris
Paris-Saclay: PHENIICS (Particules, Hadrons, Énergy, Noyau, Instrumentation, Imagerie, Cosmos et Simulation)
Paris-Centre: PIF (Physique en Île de France)
Paris Université Diderot, ENS, UPMC : STEP'UP (Science de la Terre et de l'Environnement et Physique de l'Univers, Paris)
The main labs in the Paris area are the following:
École polytechnique : CPHT, LLR
Université Paris-Sud d'Orsay : IJCLab, IAS
CEA-Saclay (IRFU) : SPP, SAp, IPHT
Université Paris-Diderot, Université Pierre et Marie Curie, ENS: APC, LPNHE, LPTHE, LPTENS