From the far reaches of the universe to the interaction of high-energy particles, the LPNHE with its fifteen research teams explores Nature across all its scales, seeking answers to fundamental questions about the origin, structure and composition of the cosmos.
The LPNHE seeks answers to some of the most profound questions about matter, energy and the Universe. What is "dark energy" and what role has it played in the evolution of the Universe? What can high-energy particles tell us about the unification of forces? What can high-energy particles tell us about the most extreme astrophysical phenomena? The laboratory approaches those questions through programs in different domains: astroparticle physics, cosmology and particle physics. These are among the most exciting scientific areas in the 21st century, with the promise of major discoveries in the near future. The research division of the LPNHE includes more than one hundred researchers organized in fifteen research groups. Thirteen of them are involved in different experimental projects in the frame of large international collaborations and world-class research facilities. Two theoretical groups complement the experimental activity.
Currently the major research programs at the LPNHE concern:

• Origin of particle masses and families in ATLAS, CDF and D0
• Matter-antimatter asymmetries in Babar and LHCB
• Neutrinos properties in T2K
• Energy content of the Universe in SNLS, SNF, LSST, and Euclid
• Origin of very-high energy cosmic rays in HESS and Pierre Auger Observatory.