NewsPhysics

The ATLAS experiment at CERN has utilized collisions of protons with oxygen nuclei to test current models describing the interaction of cosmic rays with Earth's atmosphere. These models are crucial for interpreting data from ultra-high-energy cosmic ray detectors, such as the Pierre Auger Observatory, as the composition of primary cosmic rays (mainly protons or heavier nuclei) significantly influences the development of particle cascades observed in the atmosphere.

Although the original text does not provide specific details on the results or methodology employed, the relevance of this type of experiment lies in its ability to simulate in the laboratory the high-energy interactions that occur in the upper atmosphere. By colliding protons with oxygen nuclei, scientists can study the production of new particles and the energy distribution, data that are fundamental for refining atmospheric cascade simulations and, ultimately, determining the nature of primary cosmic rays. The energy of these collisions at the LHC, although lower than that of the most energetic cosmic rays, allows for exploring an energy regime relevant for calibrating and validating theoretical models.

“The ATLAS experiment at CERN has utilized collisions of protons with oxygen nuclei to test current models describing the interaction of cosmic rays with Earth's atmosphere.”