Flipped SU(5) - Comparison With The Standard SU(5)

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:

    Clay answered the petition by declaring that while he looked on the institution of slavery as an evil, it was ‘nothing in comparison with the far greater evil which would inevitably flow from a sudden and indiscriminate emancipation.’
    State of Indiana, U.S. public relief program (1935-1943)

    Gentlemen, those confederate flags and our national standard are what has made this union great. In what other country could a man who fought against you be permitted to serve as judge over you, be permitted to run for reelection and bespeak your suffrage on Tuesday next at the poles.
    Laurence Stallings (1894–1968)