Absence of Rapid Proton Decay and Origin of Low-Energy Particlesand Yukawa Couplings

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In string theory, massless particles often originate from a symmetry breaking of a large gauge symmetry G to its subgroup H. The absence of dimension-4 proton decay in supersymmetric theories suggests that ({bar D},L) are different from {bar H}({bar 5}) in their origins. In this article, we consider a possibility that they come from different irreducible components in g/h. Requiring that all the Yukawa coupling constants of quarks and leptons be generated from the super Yang-Mills interactions of G, we found in the context of Georgi-Glashow H = SU(5) unification that the minimal choice of G is E{sub 7} and ... continued below

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Tatar, Radu & Watari, Taizan January 1, 2006.

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In string theory, massless particles often originate from a symmetry breaking of a large gauge symmetry G to its subgroup H. The absence of dimension-4 proton decay in supersymmetric theories suggests that ({bar D},L) are different from {bar H}({bar 5}) in their origins. In this article, we consider a possibility that they come from different irreducible components in g/h. Requiring that all the Yukawa coupling constants of quarks and leptons be generated from the super Yang-Mills interactions of G, we found in the context of Georgi-Glashow H = SU(5) unification that the minimal choice of G is E{sub 7} and E{sub 8} is the only alternative. This idea is systematically implemented in Heterotic String, M theory and F theory, confirming the absence of dimension 4 proton decay operators. Not only H = SU(5) but also G constrain operators of effective field theories, providing non-trivial information.

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  • Journal Name: Nuclear Physics B, Particle Physics; Journal Volume: 747; Related Information: Journal Publication Date: 2006

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  • Report No.: LBNL--59632
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1016/j.nuclphysb.2006.04.025 | External Link
  • Office of Scientific & Technical Information Report Number: 919249
  • Archival Resource Key: ark:/67531/metadc885508

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  • January 1, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 13, 2016, 8:53 p.m.

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Tatar, Radu & Watari, Taizan. Absence of Rapid Proton Decay and Origin of Low-Energy Particlesand Yukawa Couplings, article, January 1, 2006; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc885508/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.