D* mesons are a type of subatomic particle known as mesons, which are made up of a quark and an antiquark. Specifically, D* mesons contain a charm quark and a lighter quark, such as an up or down quark. They are part of the broader family of charm mesons and are important in studying the interactions of strong force and weak force in particle physics. D* mesons are characterized by their unique properties, including their mass and decay patterns. They can exist in different states, such as the D*0 and D*+, and they often decay into other particles, providing valuable insights into the behavior of quarks and the fundamental forces that govern particle interactions.