Charm-strange mesons are a type of subatomic particle made up of a combination of quarks. Specifically, they consist of a charm quark and a strange quark, which are held together by the strong force. These mesons are part of the broader family of mesons, which are composed of quark-antiquark pairs. These particles play a significant role in particle physics, particularly in the study of quantum chromodynamics and the interactions between different types of quarks. Charm-strange mesons can help scientists understand the behavior of matter under extreme conditions and contribute to the exploration of CP violation, which has implications for the matter-antimatter asymmetry in the universe.