The Large Hadron collider has recently discovered a particle that has properties similar to the Standard Model Higgs boson. The LHC experiments will continue to collect data to measure the properties of the Higgs-like boson more accurately to determine if it is the Standard Model Higgs. The Higgs-like particle that was observed also suggests that there are new colored states with masses that can be within reach of the Large Hadron Collider. In this thesis, I discuss the idea of simplified models, which seeks to better guide experimental searches for new states beyond the Standard Model, as well as new techniques to improve the sensitivity of current searches for colored particles. Finally, I discuss the implications of the Higgs on searches for new physics at the LHC and other experiments.

The LHC is in the frontline of experimental searches for New Physics beyond the Standard Model of Particle Physics. Its power is accompanied by no smaller challenges in analyzing and interpreting its results. In this thesis I explore ways to parameterize new physics phenomena, design search strategies that are sensitive to them, and interpret experimental results in general new physics contexts. In particular, I discuss interpretations of the first ATLAS analysis for supersymmetry with 70/nb of integrated luminosity. I also carry a careful investigation of comprehensive search strategies for new physics with jets and missing energy signatures, and estimate the sensitivity bounds of the 7 TeV LHC to new colored particles decaying to jets and and a neutral particle that escapes detection. Finally, I discuss the implications of the recent LHC excesses hinting to a Higgs boson with mass in the range 142-147 GeV. If confirmed, this range for the Higgs mass will be an important evidence for Split Supersymmetry. I work out the phenomenological predictions of this scenario that will be tested in the very near future by a variety of experiments, including direct and indirect dark matter detection, EDM experiments searching for CP violation and the 7 TeV run of the LHC.

The Large Hadron Collider (LHC), located at CERN, Geneva, Switzerland, is the world's largest and highest energy and highest intensity particle accelerator. Here is a timely book with several perspectives on the hoped-for discoveries from the LHC.This book provides an overview on the techniques that will be crucial for finding new physics at the LHC, as well as perspectives on the importance and implications of the discoveries. Among the accomplished contributors to this book are leaders and visionaries in the field of particle physics beyond the Standard Model, including two Nobel Laureates (Steven Weinberg and Frank Wilczek), and presumably some future Nobel Laureates, plus top younger theorists and experimenters. With its blend of popular and technical contents, the book will have wide appeal, not only to physical scientists but also to those in related fields.

The first run of the Large Hadron Collider (LHC) has strongly challenged our view of new physics by tightly constraining the most investigated scenarios such as super- symmetry. If new physics is within the reach of future experiments, discovering it will require devising new data analysis techniques and considering new approaches to open issues such as the fine-tuning problem. This thesis discusses how to elaborate new search strategies using signature-based --bottom-up-- approaches. It focuses in particular on multijet LHC signatures, the fine-tuning problem, dark matter detection and explaining non-standards Higgs couplings.

Michael Hauschild takes the reader of this essential back to the year 2012, when the discovery of the Higgs particle was announced at CERN, the European Organization for Nuclear Research near Geneva, Switzerland. The author vividly explains the Higgs mechanism for mass generation with the central role of the Higgs particle in current particle physics and the long hunt for its discovery at the Large Hadron Collider LHC. After a stop of more than two years, the LHC, the world‘s largest particle accelerator was put back into operation in spring 2015 to discover the secrets of nature at higher energy than ever before. An overview of future projects concludes this essential. This Springer essential is a translation of the original German 1st edition essentials, Neustart des LHC: die Entdeckung des Higgs-Teilchens by Michael Hauschild, published by Springer Fachmedien Wiesbaden GmbH, part of Springer Nature in 2018. The translation was done with the help of artificial intelligence (machine translation by the service DeepL.com). A subsequent human revision was done primarily in terms of content, so that the book will read stylistically different from a conventional translation. Springer Nature works continuously to further the development of tools for the production of books and on the related technologies to support the authors. The Content Mass does it! - How the particles get their mass From UFOs and more! - The LHC goes into the next round The plan of the century! - Higgs, what next? The Target groups Scientifically interested laymen and students Lecturers and students of the Studium Generale and the natural sciences The Author Dr. Michael Hauschild is a particle physicist at CERN in Geneva and has been a member of the ATLAS experiment at the Large Hadron Collider LHC since 2005. During the first long measurement period of the LHC from 2010 to 2012, he witnessed the discovery of the Higgs particle in summer 2012.

The Large Hadron Collider (LHC) is the biggest, and by far the most powerful, machine ever built. A project of CERN, the European Organization for Nuclear Research, its audacious purpose is to re-create, in a 16.5-mile-long circular tunnel under the French-Swiss countryside, the immensely hot and dense conditions that existed some 13.7 billion years ago within the first trillionth of a second after the fiery birth of our universe. In Present at the Creation, Amir D. Aczel takes us inside the control rooms, as an international team of researchers begins to discover whether a multibillion-euro investment will fulfill its promise: to find empirical confirmation of theories in physics and cosmology. Through the eyes and words of the men and women who conceived and built CERN and the LHC, Aczel enriches all of us with a firm grounding in the scientific concepts necessary to appreciate fully the stunning July 4, 2012 discovery of the Higgs Boson. Newly updated in the wake of the discovery, Present at the Creation tells the story of perhaps the greatest experiment in the history of science.

The LHC is in the frontline of experimental searches for New Physics beyond the Standard Model of Particle Physics. Its power is accompanied by no smaller challenges in analyzing and interpreting its results. In this thesis I explore ways to parameterize new physics phenomena, design search strategies that are sensitive to them, and interpret experimental results in general new physics contexts. In particular, I discuss interpretations of the first ATLAS analysis for supersymmetry with 70/nb of integrated luminosity. I also carry a careful investigation of comprehensive search strategies for new physics with jets and missing energy signatures, and estimate the sensitivity bounds of the 7 TeV LHC to new colored particles decaying to jets and and a neutral particle that escapes detection. Finally, I discuss the implications of the recent LHC excesses hinting to a Higgs boson with mass in the range 142-147 GeV. If confirmed, this range for the Higgs mass will be an important evidence for Split Supersymmetry. I work out the phenomenological predictions of this scenario that will be tested in the very near future by a variety of experiments, including direct and indirect dark matter detection, EDM experiments searching for CP violation and the 7 TeV run of the LHC.