====== TTP98-40 The Tau Lepton: Particle Physics in a Nutshell ====== Recent theoretical results in tau lepton physics and their implications for the experimental analysis are presented. The paper is split into the following chapters: 1. Introduction, 2. Weak Couplings, 3. Inclusive Decays, Perturbative QCD and Sum Rules, 4. Exclusive Decays, 5. Beyond the Standard Model. |**J.H. Kuehn** | |** TAU '98 , Proceedings of the Fifth Workshop on Tau Lepton Physics, Santander, Spain, 1998, edited by A. Pich Zardoya and A. Ruiz Jimeno, Nucl. Phys. B (Proc. Suppl.) 76 (1999) 21-44. ** | | {{preprints:1998:ttp98-40.pdf|PDF}} {{preprints:1998:ttp98-40.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9812399|arXiv]] | | |