Manual Gauge theories of strong, weak and electromagnetic interactions

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Contents

  1. Gauge Theories of the Strong, Weak and Electromagnetic Interactions (Frontiers in Physics)
  2. The Weinberg‐Salam Model of Electroweak Interactions: Ingenious Discovery or Lucky Hunch?
  3. Gauge theory - Wikipedia

There are representations that transform covariantly pointwise called by physicists gauge transformations of the first kind , representations that transform as a connection form called by physicists gauge transformations of the second kind, an affine representation —and other more general representations, such as the B field in BF theory. There are more general nonlinear representations realizations , but these are extremely complicated. Still, nonlinear sigma models transform nonlinearly, so there are applications. If there is a principal bundle P whose base space is space or spacetime and structure group is a Lie group, then the sections of P form a principal homogeneous space of the group of gauge transformations.

If a local frame is chosen a local basis of sections , then this covariant derivative is represented by the connection form A , a Lie algebra-valued 1-form , which is called the gauge potential in physics. This is evidently not an intrinsic but a frame-dependent quantity. The curvature form F , a Lie algebra-valued 2-form that is an intrinsic quantity, is constructed from a connection form by.

Under such an infinitesimal gauge transformation,. Not all gauge transformations can be generated by infinitesimal gauge transformations in general. An example is when the base manifold is a compact manifold without boundary such that the homotopy class of mappings from that manifold to the Lie group is nontrivial.

See instanton for an example. A quantity which is gauge-invariant i. The formalism of gauge theory carries over to a general setting.

For example, it is sufficient to ask that a vector bundle have a metric connection ; when one does so, one finds that the metric connection satisfies the Yang-Mills equations of motion. Gauge theories may be quantized by specialization of methods which are applicable to any quantum field theory. However, because of the subtleties imposed by the gauge constraints see section on Mathematical formalism, above there are many technical problems to be solved which do not arise in other field theories. At the same time, the richer structure of gauge theories allows simplification of some computations: for example Ward identities connect different renormalization constants.

The first gauge theory quantized was quantum electrodynamics QED. The first methods developed for this involved gauge fixing and then applying canonical quantization. The Gupta—Bleuler method was also developed to handle this problem. Non-abelian gauge theories are now handled by a variety of means. Methods for quantization are covered in the article on quantization. The main point to quantization is to be able to compute quantum amplitudes for various processes allowed by the theory.

Technically, they reduce to the computations of certain correlation functions in the vacuum state. This involves a renormalization of the theory. When the running coupling of the theory is small enough, then all required quantities may be computed in perturbation theory. Quantization schemes intended to simplify such computations such as canonical quantization may be called perturbative quantization schemes. At present some of these methods lead to the most precise experimental tests of gauge theories. However, in most gauge theories, there are many interesting questions which are non-perturbative.

Quantization schemes suited to these problems such as lattice gauge theory may be called non-perturbative quantization schemes. Precise computations in such schemes often require supercomputing , and are therefore less well-developed currently than other schemes. Some of the symmetries of the classical theory are then seen not to hold in the quantum theory; a phenomenon called an anomaly. Among the most well known are:. A pure gauge is the set of field configurations obtained by a gauge transformation on the null-field configuration, i.

Gauge Theories of the Strong, Weak and Electromagnetic Interactions (Frontiers in Physics)

So it is a particular "gauge orbit" in the field configuration's space. From Wikipedia, the free encyclopedia. Physical theory with fields invariant under the action of local "gauge" Lie groups. For a more accessible and less technical introduction to this topic, see Introduction to gauge theory. This article includes a list of references , but its sources remain unclear because it has insufficient inline citations.

Please help to improve this article by introducing more precise citations. September Learn how and when to remove this template message. Feynman diagram. Standard Model. Quantum electrodynamics Electroweak interaction Quantum chromodynamics Higgs mechanism. Incomplete theories. Anderson P.

Main article: Yang—Mills theory. See also: Dirac equation , Maxwell's equations , and Quantum electrodynamics. Main article: Quantum gauge theory. Gauge principle Aharonov—Bohm effect Coulomb gauge Electroweak theory Gauge covariant derivative Gauge fixing Gauge gravitation theory Gauge group mathematics Kaluza—Klein theory Lorenz gauge Quantum chromodynamics Gluon field Gluon field strength tensor Quantum electrodynamics Electromagnetic four-potential Electromagnetic tensor Quantum field theory Quantum gauge theory Standard Model Standard Model mathematical formulation Symmetry breaking Symmetry in physics Symmetry in quantum mechanics Ward identities Yang—Mills theory Yang—Mills existence and mass gap PRL symmetry breaking papers.

Bibcode : RvMP Bibcode : PhRv Constructing Quarks. University of Chicago Press. String theory Loop quantum gravity Causal dynamical triangulation Canonical quantum gravity Superfluid vacuum theory Twistor theory.

The Weinberg‐Salam Model of Electroweak Interactions: Ingenious Discovery or Lucky Hunch?

Authority control NDL : Categories : Gauge theories Theoretical physics. Hidden categories: Articles with short description Articles with separate introductions Articles lacking in-text citations from September All articles lacking in-text citations Wikipedia articles needing clarification from February All articles with unsourced statements Articles with unsourced statements from November Wikipedia articles with NDL identifiers.

Namespaces Article Talk. Views Read Edit View history. In other projects Wikiquote. By using this site, you agree to the Terms of Use and Privacy Policy. Standard Model Quantum electrodynamics Electroweak interaction Quantum chromodynamics Higgs mechanism.

Chapter 1 [PDF]. I highly recommend it for a two-semester advanced graduate course in particle physics and as a valuable addition to the collection of every particle physicist. Quigg's broad experience is seen in the clear and thorough exposition of the principles underlying the interactions of gauge fields and elementary particles.

The book's numerous examples will aid students in understanding technical details. Providing a clear picture of physical laws and new perspectives, the book is elegantly written and wonderfully engaging. With elegance and clarity, it sets a good example for other texts to follow.

Gauge theory - Wikipedia

I salute the author for such a great piece of work. Chris Quigg. Subject Areas. Need textbooks? Group structure of gauge theories Elementary particle physics Selected Topics in Gauge Theories Strong interactions and Gauge theories Eichtheorie der Schwachen Wechselwirkung Topology and analysis The theory of gauge fields in four dimensions Finsler geometry, relativity and gauge theories Asymptotic Behavior of Mass and Spacetime Geometry Introduction to gauge field theories An elementary primer for gauge theory A Gauge Theory of Dislocations and Disclinations Gauge theories of the strong, weak and electromagnetic interactions Gauge Theories of the Eighties Gauge Theory and Gravitation Lattice gauge theories and Monte Carlo simulations Differential Geometric Methods in Mathematical Physics Gauge theory Geometric Techniques in Gauge Theories Geometrical and Topological Methods in Gauge Theories Vortices and monopoles Fiber Bundle Techniques in Gauge Theories Jean-Jacques Szczeciniarz.

Traducteur 5 David D. Neal I. Adolf Mader. Gil B.


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  4. Gauge Theories of the Strong, Weak, and Electromagnetic Interactions : Chris Quigg : !

David E. Bryce Seligman Dewitt. Michael Dine. Petre Dita.