Precision Electroweak Physics At Electron Positron Colliders

This up-to-date volume reviews the recent contributions of electron-positron colliders to the precision test of the electroweak Standard Model. In particular, it contains a short summary of the measurements at the Z resonance and gives an overview of the electroweak processes above the Z. Subsequently, the measurement of the W mass at LEP is discussed in detail. The implications for the precision test of the Standard Model are presented, giving the status of the global electroweak fit before the startup of Large Hadron Collider. The final chapters give an outlook on the electroweak physics at a future linear collider. The book also features many illustrations and tables. Readers obtain a coherent overview of the results of 20 years of electroweak physics conducted at electron-positron colliders.

During more than 10 years, from 1989 until 2000, the LEP accelerator and the four LEP experiments, ALEPH, DELPHI, L3 and OPAL, have taken data for a large amount of measurements at the frontier of particle physics. The main outcome is a thorough and successful test of the Standard Model of electroweak interactions. Mass and width of the Z and W bosons were measured precisely, as well as the Z and photon couplings to fermions and the couplings among gauge bosons. The rst part of this work will describe the most important physics results of the LEP experiments. Emphasis is put on the properties of the W boson, which was my main research eld at LEP. Especially the precise determination of its mass and its couplings to the other gauge bosons will be described. Details on physics effects like Colour Reconnection and Bose-Einstein Correlations in W-pair events shall be discussed as well. A conclusive summary of the current electroweak measurements, including low-energy results, as the pillars of possible future ndings will be given. The important contributions from Tevatron, like the measurement of the top quark and W mass, will round up the present day picture of electroweak particle physics. This is an open access book.

This book provides a comprehensive summary of studies of the Z boson in electron positron interactions. The results that have been obtained have achieved unprecedented accuracy and have firmly established the Electroweak Standard Model as the cornerstone of our current understanding of modern particle physics. The book introduces the background to the Standard Model and the role of the Z boson and describes briefly the accelerators and experiments involved in these results. The five main chapters deal with the detailed measurements of the electroweak parameters of the Z, the study of QCD, heavy quark physics, tau lepton physics and the search for new particles. Each chapter ends with a summary and outlook to prospects of future accelerators. Most of the results are from the first six years running at the first phase of electron positron collider, LEP, at energies corresponding to the Z mass, but results from the SLAC Linear Collider and some new results at higher energies are also included.

The book is a compilation of the most important experimental results achieved during the past 60 years at CERN - from the mid-1950s to the latest discovery of the Higgs particle. Covering the results from the early accelerators at CERN to those most recent at the LHC, the contents provide an excellent review of the achievements of this outstanding laboratory. Not only presented is the impressive scientific progress achieved during the past six decades, but also demonstrated is the special way in which successful international collaboration exists at CERN.

This workshop brought together for the first time accelerator experts as well as experimental and theoretical high energy physicists from all over the world to consider the physics potential of high energy linear electron-positron colliders. A wide variety of physics cases were presented ranging from precision tests of the top quark and electroweak gauge bosons to searches of the intermediate mass Higgs bosons and supersymmetric particles.

The high energy electron-positron linear collider is expected to provide crucial clues to many of the fundamental questions of our time: What is the nature of electroweak symmetry breaking? Does a Standard Model Higgs boson exist, or does nature take the route of supersymmetry, technicolor or extra dimensions, or none of the foregoing? This invaluable book is a collection of articles written by experts on many of the most important topics which the linear collider will focus on. It is aimed primarily at graduate students but will undoubtedly be useful also to any active researcher on the physics of the next generation linear collider. Contents:The Machine and Detector (G A Blair & D J Miller)Higgs Physics at the Linear Collider (J F Gunion et al.)Top Quark Physics (Y Sumino)Supersymmetry and the Linear Collider (J L Feng & M M Nojiri)Dynamical Electroweak Symmetry Breaking (W Kilian)Physics of Electroweak Gauge Bosons (K Mönig)New Physics at the TeV Scale and Beyond (J L Hewett)QCD (P N Burrows)Gamma-Gamma and Other Options (T Takahashi)CP Violation at the Linear Collider (D Atwood & A Soni)Overall Perspective (K Fujii & M E Peskin) Readership: Researchers in high energy, particle and accelerator physics. Keywords:Electron-Positron Linear Collider;Higgs Boson;Top Quark;Supersymmetry;Extra Dimensions;Collider

I. Introduction : precision tests and particle physics / by Paul Langacker -- II. The standard electroweak model. A. Structure of the standard model / by Paul Langacker -- B. Renormalization of the standard model / by Wolfgang Hollik -- C. Predictions for e+e- processes / by Wolfgang Hollik -- D. Radiative corrections to neutral current processes / by William J. Marciano -- III. Precision tests at e+e- colliders. A. e+e- Annihilation from [symbol]s = 20 to 65 GeV / by Dieter Haidt -- B. Z0-pole experiments -- C. Beam polarization in e+e- annihilation / by Alain Blondel -- D. The LEP 200 programme / by Daniel Treille -- IV. The weak neutral current. A. The measurement of electroweak parameters from deep inelastic neutrino scattering / by Frederic Perrier -- B. Neutrino-proton elastic scattering / by Alfred K. Mann -- C. Neutrino-electron scattering / by Jaap Panman -- D. Atomic parity nonconservation experiments / by B. Patrick Masicrsvn and Carl E. Wieman -- E. The theory of atomic parity violation / by S. A. Blundell, W. R. Johnson, and Jonathan Sapirstein -- F. Charged Lepton-Hadron asymmetries in fixed target experiments / by Paul Souder -- G. Precision electroweak tests at HERA / by Hubert Spiesberger -- V. The weak charged current. A. precision measurements in muon and tau decays / by Wulf Fetscher and H.-J. Gtrber -- B. Symmetry-tests in semileptonic weak interactions : a search for new physics / by Jules Dtutsch and Paid Quin -- C. Universality of the weak interactions / by Alberto Sirlin -- D. Beta decay and muon decay beyond the standard model / by Peter Herczeg -- VI. Precision tests at hadron colliders / by Kevin Einsweiler -- VII. Implications of precision experiments. A. Tests of the standard model and searches for new physics / by Paul Langacker -- B. Exotic fermions / by David London -- VIII . The future / by Mingxing Luo