Particle Physics is a branch of Physics. It’s a study of particles which are constituents of matter. Matter and radiation contains subatomic particles. It deals with the basic elements of matter and the force existing between them. Particle Physics deals with a study of these particles and a study of the behavior of particles when forces act upon them Particle Physics is aimed at determining the rules that control the making of matter and physical universe. Experiments which involve collision of sub atomic particles at high energies, done at particle accelerators reveal details of particles and conditions that existed after the Big Bang which occurred over 15 billion years ago. Most of the experiments are done by international collaborations and are performed at overseas laboratories such as CERN and DESY Accelerators are considered as the basic tool to particle Physics as they allow us the collision of particles which we want to study in laboratories . .