GUT breaking on the brane?

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We present a five-dimensional supersymmetric SU(5) theory in which the gauge symmetry is broken maximally (i.e. at the 5D Planck scale M{sub *}) on the same 4D brane where chiral matter is localized. Masses of the lightest Kaluza-Klein modes for the colored Higgs and X and Y gauge fields are determined by the compactification scale of the fifth dimension, M{sub C} {approx} 10{sup 15} GeV, rather than by M{sub *}. These fields' wave functions are repelled from the GUT-breaking brane, so that proton decay rates are suppressed below experimental limits. Above the compactification scale, the differences between the standard model ... continued below

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Smith, David; Nomura, Yasunori & Weiner, Neal April 4, 2001.

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We present a five-dimensional supersymmetric SU(5) theory in which the gauge symmetry is broken maximally (i.e. at the 5D Planck scale M{sub *}) on the same 4D brane where chiral matter is localized. Masses of the lightest Kaluza-Klein modes for the colored Higgs and X and Y gauge fields are determined by the compactification scale of the fifth dimension, M{sub C} {approx} 10{sup 15} GeV, rather than by M{sub *}. These fields' wave functions are repelled from the GUT-breaking brane, so that proton decay rates are suppressed below experimental limits. Above the compactification scale, the differences between the standard model gauge couplings evolve logarithmically, so that ordinary logarithmic gauge coupling unification is preserved. The maximal breaking of the grand unified group can also lead to other effects, such as O(1) deviations from SU(5) predictions of Yukawa couplings, even in models utilizing the Froggatt-Nielsen mechanism.

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  • Journal Name: Nuclear Physics B; Journal Volume: 613; Related Information: Journal Publication Date: 2001

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  • Report No.: LBNL--47677
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 860772
  • Archival Resource Key: ark:/67531/metadc779490

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  • April 4, 2001

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  • Dec. 3, 2015, 9:30 a.m.

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  • April 1, 2016, 8:03 p.m.

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Smith, David; Nomura, Yasunori & Weiner, Neal. GUT breaking on the brane?, article, April 4, 2001; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc779490/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.