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Experiments back in business at a new record energy at CERN's LHC

On June 3, the first proton-proton collisions at the unprecedented energy of 13 TeV took place at CERN's Large Hadron Collider (LHC). This marks the start of season 2 at the LHC, opening the way to new experiments and discoveries, to which the Leprince Ringuet Laboratory contributes.

The first successful three-year campaign led to the discovery of the Higgs boson, the last missing piece of the Standard Model, the theory that describes the fundamental particles making up all that is visible in the Universe as well as the way these particles interact with one another.

The Large Hadron Collider (LHC) at CERN was shut for almost 24 months in order to to adapt the machine and experiments to the new collision energies that can be reached. Physicists are now ready to explore the new frontiers of the infinitesimal. The CMS group at Leprince Ringuet Laboratory (LLR - CNRS, École Polytechnique) helped improve the detector and prepare analyzes of the physics of collisions at 13 TeV.

The Large Hadron Collider (LHC) at CERN started producing data again for physicists for the first time in 27 months. The LHC will now be used at full capacity over the next three years.

For this second operation period, physicists will continue to explore the Standard Model, and also look for signs of new physical phenomena out of this framework. This could help solve some puzzles such as dark matter, which appears to represent about a quarter of the universe, or the fact that nature seems to favor matter over antimatter, a condition without which we would not exist.

During the previous two years, significant maintenance and improvement programs were also conducted for the four major experiments ALICE, ATLAS, CMS and LHCb, taking into account the access to these very high energies.

 "The collisions we see today indicate that the work we have done over the last two years to prepare and improve the detector has been successful, and they mark the beginning of a new era of exploration of Nature's secrets, said Tiziano Camporesi, spokesman for the CMS group. It is hard to put the enthusiasm of our teams into words, especially of our younger colleagues."

 > Read the press release online