Particle physics is a branch of physics that studies the elementary constituents of matter and radiation, and the interactions between them. It is also called high energy physics, because many elementary particles do not occur under normal circumstances in nature, but can be created and detected during energetic collisions of other particles, as is done in particle accelerators. Research in this area has produced a long list of particles.
The Cluster Pluckers are a quartet of harmony singer-songwriters and country music instrumentalists active since 1980. The original and remaining members are Margaret Bailey, Kris Ballinger and Dale Ballinger, later joined by Mark Howard. In the spring of 1980, the trio of Margaret, Kris and Dale first sang together at a pickin' party. They were then joined by fiddler Frazier Moss. They performed at the Folklife Festival Exhibition during the 1982 World's Fair in Knoxville, Tennessee.