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1. • CommentRowNumber1.
   • CommentAuthorUrs
   • CommentTimeDec 3rd 2018
   • PermaLink
   Author: Urs
   Format: MarkdownItexstub entry, for the moment just so as to satisfy links <a href="https://ncatlab.org/nlab/revision/color+charge/1">v1</a>, <a href="https://ncatlab.org/nlab/show/color+charge">current</a>

   stub entry, for the moment just so as to satisfy links

   v1, current

2. • CommentRowNumber2.
   • CommentAuthorUrs
   • CommentTimeJan 24th 2020
   • PermaLink
   Author: Urs
   Format: MarkdownItexadded two sentences to the Idea-section, to provide more of an explanation: *** If the [[gauge group]] is [[SU(N)]] and [[fermions]] are in the [[fundamental representation]] $\mathbf{N}$ of [[dimension]] $N$, so that $\mathbf{N}$ has a [[linear basis]] of $N$ elements, one says that these are $N$ colors of the given [[fermion]] [[fundamental particle|particle]]. Hence, more generally one could reasonably say that the "number of colors" of a given [[fundamental particle]] in [[gauge theory]] is physics synonym for the choice of [[linear representation]] of the [[gauge group]] that defines this particle. *** <a href="https://ncatlab.org/nlab/revision/diff/color+charge/2">diff</a>, <a href="https://ncatlab.org/nlab/revision/color+charge/2">v2</a>, <a href="https://ncatlab.org/nlab/show/color+charge">current</a>

   added two sentences to the Idea-section, to provide more of an explanation:

   ---

   If the gauge group is SU(N) and fermions are in the fundamental representation $\mathbf{N}$ of dimension $N$, so that $\mathbf{N}$ has a linear basis of $N$ elements, one says that these are $N$ colors of the given fermion particle.

   Hence, more generally one could reasonably say that the “number of colors” of a given fundamental particle in gauge theory is physics synonym for the choice of linear representation of the gauge group that defines this particle.

   ---

   diff, v2, current