Kang-Sin Choi – författare

This book is a guide for all those who want to explore the standard model using string theory. The approach pursued is “halfway” between a textbook and advanced research work and, accordingly, the book will allow both graduate students and particle phenomenologists to easily get acquainted with this fascinating field.In this new edition the authors report on the status quo of the standard model following the discovery of the Higgs Boson, as well as the latest results concerning physics beyond the standard model. They present a formal introduction to string orbifolds and explain in detail how the massless states and the Kaluza-Klein spectra can be derived from the partition function. In turn, they provide an overview of orbifold phenomenology, by introducing the key aspects of string orbifolds in the context of SUSY standard models. In closing, the authors discuss the Grand Unified Theories (GUTs) from orbifolds and share key concepts regarding Calabi-Yau compactifications, M-theory and F-theory.

Using the successful standard model of particle physics but without clear guidance beyond it, it is a di?cult task to write a physics book beyond the standard model from a phenomenological point of view. At present, there is no major convincing inner space related experimental evidence against the standard model. The neutrino oscillation phenomena can be considered part of it by including a singlet ?eld in the spectrum. Only the outer space - servations on matter asymmetry, dark matter, and dark energy hint at the phenomenological need for an extension; however, there has been theoretical need for almost three decades, chie?y because of the gauge hierarchy problem in the standard model. Thus, it seems that going beyond the standard model hinges on the des- ability of resolving the hierarchy problem. At the ?eld theory level, it is fair to say that the hierarchy problem is not as desperate as the nonrenormalizab- ity problem present in the old V–A theory of weak interactions on the road to the standard model. An extension beyond the standard model can easily be ruled out as witnessed in the case of technicolor. However, a consistent framework with supersymmetry for a resolution of the hierarchy problem has been around for a long time. Even its culprit “superstring” has been around for twenty years, and the most remarkable thing about this supersymmetric extension is that it is still alive.