Particle interactions are fundamental processes that occur when particles, such as electrons, protons, and neutrons, come into contact or influence each other. These interactions are governed by the four fundamental forces of nature: gravity, electromagnetism, strong nuclear force, and weak nuclear force. Understanding these interactions is crucial for explaining the behavior of matter and the universe at the smallest scales. In particle physics, interactions can lead to various phenomena, including scattering, decay, and the formation of new particles. Experiments conducted in facilities like CERN help scientists explore these interactions, providing insights into the fundamental building blocks of matter and the forces that govern their behavior.