Introduction to Particle and Astroparticle Physics : Multimessenger Astronomy and its Particle Physics Foundations This book introduces particle physics astrophysics and cosmology. Starting from an experimental perspective it provides a unified view of these fields that reflects the very rapid advances being made. This new edition has a number of improvements and has been updated to include material on the Higgs particle and to describe the recently discovered gravitational waves. Astroparticle and particle physics share a common problem: we still don’t have a description of the main ingredients of the Universe from the point of view of its energy budget. Addressing these fascinating issues and offering a balanced introduction to particle and astroparticle physics that requires only a basic understanding of quantum and classical physics this book is a valuable resource particularly for advanced undergraduate students and for those embarking on graduate courses. It includes exercises that offer readers practical insights. It can be used equally well as a self study book a reference and a textbook Understanding the universe: particles and their interactions The birth and the basics of particle physics Cosmic rays and the development of particle physics Particle detection Particles and symmetries Interactions and field theories The Higgs mechanism and the standard model of particle physics The standard model of cosmology and the dark universe Neutrino oscillations and masses Messengers from the high energy universe Astrobiology and the relation of fundamental physics to life