The branch of physics which focuses on the study of the nature of particles which comprise radiation and matter is known as particle physics. It also studies the fundamental interactions which are necessary to explain the behavior of the irreducibly small particles. Some of the subatomic particles studied within this field are protons, electrons, neutrons, quarks and leptons. The classification of these particles is done using the theory of the Standard Model of particle physics. There are numerous other theories which are also studied within this field like quantum field theory, effective field theory and lattice field theory. Particle physics is applied in varied sectors such as medicine, computing and national security. This book includes some of the vital pieces of work being conducted across the world, on various topics related to particle physics. It is an upcoming field of science that has undergone rapid development over the past few decades. This book will help the readers in keeping pace with the rapid changes in this field.