Book contents
- Frontmatter
- Dedication
- Contents
- Preface
- Acknowledgements
- List of Abbreviations
- Introduction
- Part I Basics of Gauge Theories
- Part II The StandardModel
- Part III Weak Decays in the StandardModel
- Part IV Weak Decays beyond the StandardModel
- 13 First Steps beyond the Standard Model
- 14 Standard Model Effective Field Theory
- 15 Simplest Extensions of the SM
- 16 Specific Models
- 17 Beyond Quark Flavor Physics
- 18 Grand Summary of New Physics Models
- 19 Flavor Expedition to the Zeptouniverse
- 20 Summary and Shopping List
- Appendix A Dirac Algebra, Spinors, Pauli and Gell-Mann Matrices
- Appendix B Feynman Rules of the Standard Model
- Appendix C Massive Loop Integrals
- Appendix D Numerical Input
- Appendix E Analytic Solutions to SMEFT RG Equations
- References
- Index
16 - Specific Models
from Part IV - Weak Decays beyond the StandardModel
Published online by Cambridge University Press: 11 June 2020
- Frontmatter
- Dedication
- Contents
- Preface
- Acknowledgements
- List of Abbreviations
- Introduction
- Part I Basics of Gauge Theories
- Part II The StandardModel
- Part III Weak Decays in the StandardModel
- Part IV Weak Decays beyond the StandardModel
- 13 First Steps beyond the Standard Model
- 14 Standard Model Effective Field Theory
- 15 Simplest Extensions of the SM
- 16 Specific Models
- 17 Beyond Quark Flavor Physics
- 18 Grand Summary of New Physics Models
- 19 Flavor Expedition to the Zeptouniverse
- 20 Summary and Shopping List
- Appendix A Dirac Algebra, Spinors, Pauli and Gell-Mann Matrices
- Appendix B Feynman Rules of the Standard Model
- Appendix C Massive Loop Integrals
- Appendix D Numerical Input
- Appendix E Analytic Solutions to SMEFT RG Equations
- References
- Index
Summary
In this chapter we will discuss flavor physics of leptons, in particular charged lepton decays mediated by flavor changing neutral currents. While very strongly suppressed within the SM, lepton flavor violation (LFV)can be by many orders of magnitude larger in NP models. Therefore finding such transitions would be a clear signal of NP.The nice feature of most of these decays is the absence of QCD corrections, making the theoretical analysis much simpler than was the case of meson decays. Another important topic are electric dipole moments (EDMs) of various atoms, molecules, nuclei, and nucleons that all are very strongly suppressed in the SM. They test CP violation without flavor violation. Similar to LFV, a measurement of any nonvanishing EDM would be a clear signal of NP at work. But in contrast to LFV there are large nonperturbative uncertainties in this case. In this part we will also discuss anomalous magnetic moments of charged leptons. We will present a compendium of formulas for many observables. These formulasare quite general so that one canuse them for various models. We will illustrate them on a few examples.
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- Gauge Theory of Weak Decays , pp. 533 - 579Publisher: Cambridge University PressPrint publication year: 2020