Comparison With The Standard SU(5)
The name "flipped" SU(5) arose in comparison to the "standard" SU(5) model of Georgi-Glashow, in which and quark are respectively assigned to the 10 and 5 representation. In comparison with the standard SU(5), the flipped SU(5) can accomplish the spontaneous symmetry breaking using Higgs fields of dimension 10, while the standard SU(5) requires both a 5- and 45-dimensional Higgs.
The sign convention for U(1)χ varies from article/book to article.
The hypercharge Y/2 is a linear combination (sum) of the of SU(5) and χ/5.
There are also the additional fields 5-2 and containing the electroweak Higgs doublets.
Calling the representations foe example, and 240 is purely a physicist's convention, not a mathematician's convention, where representations are either labelled by Young tableaux or Dynkin diagrams with numbers on their vertices, and is a standard used by GUT theorists.
Since the homotopy group
this model does not predict monopoles. See Hooft-Polyakov monopole.
Read more about this topic: Flipped SU(5)
Famous quotes containing the words comparison and/or standard:
“The comparison between Coleridge and Johnson is obvious in so far as each held sway chiefly by the power of his tongue. The difference between their methods is so marked that it is tempting, but also unnecessary, to judge one to be inferior to the other. Johnson was robust, combative, and concrete; Coleridge was the opposite. The contrast was perhaps in his mind when he said of Johnson: “his bow-wow manner must have had a good deal to do with the effect produced.””
—Virginia Woolf (1882–1941)
“Liberty requires opportunity to make a living—a living decent according to the standard of the time, a living which gives a man not only enough to live by, but something to live for.”
—Franklin D. Roosevelt (1882–1945)