nLab Yang-Mills field

Contents

Context

Physics

physics, mathematical physics, philosophy of physics

Surveys, textbooks and lecture notes


theory (physics), model (physics)

experiment, measurement, computable physics

Differential cohomology

Fields and quanta

fields and particles in particle physics

and in the standard model of particle physics:

force field gauge bosons

scalar bosons

matter field fermions (spinors, Dirac fields)

(also: antiparticles)

effective particles

hadrons (bound states of the above quarks)

solitons

in grand unified theory

minimally extended supersymmetric standard model

superpartners

bosinos:

sfermions:

dark matter candidates

Exotica

auxiliary fields

Contents

Idea

The Yang–Mills field is the gauge field of Yang-Mills gauge theory.

The YM field is modeled by principal connections, or more abstractly by cocycles in differential nonabelian cohomology. Here is the moduli stack of -principal connections, the stackification of the groupoid of Lie-algebra valued forms, regarded as a groupoid internal to smooth spaces.

This is usually represented by a vector bundle with connection.

As a nonabelian Čech cocycle the Yang-Mills field on a space is represented by

  • a cover

  • a collection of -valued 1-forms ;

  • a collection of -valued smooth functions ;

  • such that on double overlaps

  • and such that on triple overlaps

Examples

On ordinary Yang-Mills theory (YM):

On variants of Yang-Mills theory and on super Yang-Mills theory (SYM):

Morty Proxy This is a proxified and sanitized view of the page, visit original site.

Last revised on March 12, 2026 at 09:27:03. See the history of this page for a list of all contributions to it.

Morty Proxy This is a proxified and sanitized view of the page, visit original site.