# Proton stability in grand unified theories, in strings and in branes

@article{Nth2007ProtonSI,
title={Proton stability in grand unified theories, in strings and in branes},
author={P. Nāth and P. F. P{\'e}rez},
journal={Physics Reports},
year={2007},
volume={441},
pages={191-317}
}
• Published 2007
• Physics
• Physics Reports
Abstract A broad overview of the current status of proton stability in unified models of particle interactions is given which includes non-supersymmetric unification, SUSY and SUGRA unified models, unification based on extra dimensions, and string-M-theory models. The extra dimensional unification includes 5D and 6D and universal extra dimensional (UED) models, and models based on warped geometry. Proton stability in a wide array of string theory and M theory models is reviewed. These include… Expand
288 Citations

#### Figures and Tables from this paper

Dark matter in SUGRA, strings and branes
A brief review is given of dark matter in SUGRA, strings and branes. For SUGRA models the implications of Yukawa coupling unification on dark matter are discussed in the light of g 2 and b + syExpand
CP Violation From Standard Model to Strings
• Physics
• 2008
A review of CP violation from the standard model to strings is given which includes a broad landscape of particle physics models, encompassing the nonsupersymmetric four-dimensional (4D) extensionsExpand
Tri-linear couplings in an heterotic minimal supersymmetric standard model
• Physics, Mathematics
• 2006
Abstract We calculate, at the classical level, the superpotential tri-linear couplings of the only known globally consistent heterotic minimal supersymmetric Standard Model [V. Bouchard, R. Donagi,Expand
Precision unification and proton decay in F-theory GUTs with high scale supersymmetry
• Physics
• 2014
A bstractF-theory GUTs provide a promising UV completion for models with approximate gauge coupling unification, such as the (non-supersymmetric) Standard Model. More specifically, if theExpand
Aspects of extra dimensional supersymmetric unified theories
Although one does not know (yet) which phenomenon unitarizes WLWL scattering at the TeV scale, indirect data currently favors the Higgs boson. Since such a scalar particle is susceptible to become asExpand
Proton decay via dimension-six operators in intersecting D6-brane models
• Physics
• 2007
Abstract We analyze the proton decay via dimension six operators in supersymmetric SU ( 5 ) -grand unified models based on intersecting D6-brane constructions in type IIA string theory orientifolds.Expand
On unification and nucleon decay in supersymmetric grand unified theories based on SU(5)
• Physics
• 2007
Abstract We investigate the unification constraints in the minimal supersymmetric grand unified theories based on SU ( 5 ) gauge symmetry. The most general constraints on the spectrum of minimalExpand
Axion properties in GUTs
• Physics
• 2018
We summarize recent studies of realistic nonsupersymmetric Grand Unified Theories (GUTs) extended with a global $U(1)_{\rm PQ}$ symmetry, so as to accommodate the axion solution to the strong CPExpand
Proton decay and grand unification
I review the theoretical and experimental status of proton decay theory and experiment. Regarding theory, I focus mostly but not only on grand unification. I discuss only the minimal, wellExpand
Spacetime instanton corrections in 4D string vacua: The Seesaw mechanism for D-Brane models
• Physics
• 2007
Abstract We systematically investigate instanton corrections from wrapped Euclidean D-branes to the matter field superpotential of various classes of N = 1 supersymmetric D-brane models in fourExpand

#### References

SHOWING 1-10 OF 756 REFERENCES
Nucleon decay in gauge unified models with intersecting D6-branes
Baryon number violation is discussed in gauge unified orbifold models of type II string theory with intersecting Dirichlet branes. We consider setups of $D6$-branes which extend along the flatExpand
GUT model hierarchies from intersecting branes
By employing D6-branes intersecting at angles in D = 4 type I strings, we construct the first examples of three generation string GUT models (PS-A class), that contain at low energy exactly theExpand
Unified Theories from Intersecting Branes
We discuss the first string theory examples of three generation non-supersymmetric SU(5) and flipped SU(5) GUTS, which break to the Standard model at low energy, without extra matter and/or gaugeExpand
String theory and the path to unification: A Review of recent developments
Abstract This is a pedagogical review article surveying the various approaches towards understanding gauge coupling unification within string theory. As is well known, one of the major problemsExpand
Nucleon decay in supergravity unified theories.
• Physics, Medicine
• Physical review. D, Particles and fields
• 1985
A general analysis of nucleon decay in supergravity unified models is given including the full set of W-gaugino, gluino, and Z-gaugino dressing diagrams (with gauge as well as Yukawa interactions atExpand
Warped supersymmetric grand unification
• Physics
• 2003
We construct a realistic theory of grand unification in AdS_5 truncated by branes, in which the unified gauge symmetry is broken by boundary conditions and the electroweak scale is generated by theExpand
SU(5) unified theories from intersecting branes
• Physics
• 2003
We discuss the first string theory examples of three generation non-supersymmetric SU(5) and flipped SU(5) GUTS, which break to the Standard model at low energy, without extra matter and/or gaugeExpand
Tri-linear couplings in an heterotic minimal supersymmetric standard model
• Physics, Mathematics
• 2006
Abstract We calculate, at the classical level, the superpotential tri-linear couplings of the only known globally consistent heterotic minimal supersymmetric Standard Model [V. Bouchard, R. Donagi,Expand
Triplet-Doublet Splitting, Proton Stability and an Extra Dimension.
We propose a new possibility to reconcile the coupling unification scenario with the triplet-doublet mass splitting based on a 5-dimensional supersymmetric model with SU(5) gauge symmetry. It isExpand
Grand unification in RS1
• Physics
• 2003
Abstract We study unification in the Randall–Sundrum scenario for solving the hierarchy problem, with gauge fields and fermions in the bulk. We calculate the one-loop corrected low-energy effectiveExpand