Adventure Of The Large Hadron Collider, The: From The Big Bang To The Higgs Boson

An introduction to the world of quarks and leptons, and of their interactions governed by fundamental symmetries of nature, as well as an introduction to the connection that exists between worlds of the infinitesimally small and the infinitely large.

The book begins with a simple presentation of the theoretical framework, the so-called Standard Model, which evolved gradually since the 1960s. The key experiments establishing it as the theory of elementary particle physics, but also its missing pieces and conceptual weaknesses are introduced. The book proceeds with the extraordinary story of the Large Hadron Collider at CERN - the largest purely scientific project ever realized. Conception, design and construction by worldwide collaborations of the detectors of size and complexity without precedent in scientific history are discussed. The book then offers the reader a state-of-the art (2020) appreciation of the depth and breadth of the physics exploration performed by the LHC experiments: the study of new forms of matter, the understanding of symmetry-breaking phenomena at the fundamental level, the exciting searches for new physics such as dark matter, additional space dimensions, new symmetries, and more. The adventure of the LHC culminated in the discovery of the Higgs boson in 2012 (Nobel Prize in Physics in 2013). The last chapter of this book describes the plans for the LHC during the next 15 years of exploitation and improvement, and the possible evolution of the field and future collider projects under consideration.

Daniel Denegri was born in Split, Croatia, from a Croatian father and French mother; today he is research director emeritus at the CNRS in France. He studied physics at the University of Zagreb, Croatia, and subsequently obtained a PhD in particle physics at the Johns Hopkins University in Baltimore, USA. In 1971 he started working at the CEA research center in Saclay near Paris. In 1982/83 he played a most direct role in the discovery of the W and Z bosons in the experiment UA1. In 1986 he left CEA and CNRS to work at CERN. In 1989/90 he together with Carlo Rubbia initiated the LHC project, being one of the three coordinators of the physics studies in evaluating the discovery potential of the LHC. In 1990/91 he was one of the founding fathers of the CMS experiment with Michel Della Negra and Jim Virdee, being physics coordinator of the collaboration for 14 years. He had an active part in the discovery of the Higgs boson in 2012 and is now investigating the future physics program of the LHC.

Claude Guyot is a researcher at the Research Institute on the Fundamental Laws of the Universe (IRFU) at the Saclay-CEA Centre. After a PhD in particle physics in 1984 on neutrino oscillations based on results from the CDHSW experiment at CERN, he continued studying neutrino–nucleon interactions investigating electroweak interactions and the internal structure of nucleons. While studying the violation of CP and T symmetries in an experiment with neutral kaons, in 1991 he joined a group of physicists that would subsequently found the ATLAS experiment at the LHC. He was one of the physicists at the origin of the ATLAS muon spectrometer, in particular its large superconducting toroidal magnet. Since 2011 he is the head of the ATLAS group at the CEA-Saclay Centre.

Andreas Hoecker was born and studied physics in Germany. He did his PhD at the Laboratoire de l'Accelerateur Lineaire in Orsay near Paris on studies of tau lepton properties and of strong interactions, using data from the ALEPH experiment at the LEP collider at CERN. After his PhD, in 1997 he joined the CNRS and took part in the BaBar experiment at Stanford, USA, where he spent two years studying the violation of the matter–antimatter symmetry. Upon his return to Orsay, in 2005 Andreas Hoecker went to CERN on a permanent research physicist position. Since then he works on the ATLAS experiment, where he contributed in various domains of detector operation and physics data analysis, more specifically in the search for supersymmetry and the discovery of the Higgs boson. He was physics coordinator of the ATLAS collaboration in 2014 and 2015, and was elected deputy spokesperson of ATLAS in 2016.

Lydia Roos is research director at the CNRS. During her PhD studies in Marseille she studied properties of beauty mesons from data obtained with the ALEPH experiment at the LEP collider. In 1993 she joined a CNRS laboratory in Grenoble and worked on the construction and operation of a silicon pixel detector for the experiment DELPHI on the LEP. In 1996 she started working in the Laboratory for High Energy Physics in Paris. Her activities were on the matter–antimatter symmetry studies with the BaBar experiment in Stanford, USA. During a four-year stay in Beijing devoted to fostering the Franco-Chinese scientific collaboration, she led an associated international laboratory for elementary particle physics studies. At her return to Paris in 2008, she joined the ATLAS experiment. Since then she worked on the Higgs search, investigating the relevant backgrounds, and the study of Higgs boson properties.