# 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} }

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

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#### References

SHOWING 1-10 OF 756 REFERENCES

Nucleon decay in gauge unified models with intersecting D6-branes

- Physics
- 2007

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 flat… Expand

GUT model hierarchies from intersecting branes

- Physics
- 2002

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 the… Expand

Unified Theories from Intersecting Branes

- 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 gauge… Expand

String theory and the path to unification: A Review of recent developments

- Physics
- 1996

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 problems… Expand

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 at… Expand

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 the… Expand

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 gauge… Expand

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.

- Physics
- 2000

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 is… Expand

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 effective… Expand