Journal of High Energy Physics

, 2010:11

SU(5) D-brane realizations, Yukawa couplings and proton stability

  • P. Anastasopoulos
  • G. K. Leontaris
  • R. Richter
  • A. N. Schellekens
Open AccessArticle

DOI: 10.1007/JHEP12(2010)011

Cite this article as:
Anastasopoulos, P., Leontaris, G.K., Richter, R. et al. J. High Energ. Phys. (2010) 2010: 11. doi:10.1007/JHEP12(2010)011


We discuss SU(5) Grand Unified Theories in the context of orientifold compactifications. Specifically, we investigate two and three D-brane stack realizations of the Georgi-Glashow and the flipped SU(5) model and analyze them with respect to their Yukawa couplings. As pointed out in [1] the most economical Georgi-Glashow realization based on two stacks generically suffers from a disastrous large proton decay rate. We show that allowing for an additional U(1) D-brane stack this as well as other phenomenological problems can be resolved. We exemplify with globally consistent Georgi-Glashow models based on RCFT that these D-brane quivers can be indeed embedded in a global setting. These globally consistent realizations admit rigid O(1) instantons inducing the perturbatively missing coupling 10105H. Finally we show that flipped SU(5) D-brane realizations even with multiple U(1) D-brane stacks are plagued by severe phenomenological drawbacks which generically cannot be overcome.


Intersecting branes modelsD-branesSuperstring Vacua
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© The Author(s) 2010

Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

Authors and Affiliations

  • P. Anastasopoulos
    • 1
  • G. K. Leontaris
    • 2
  • R. Richter
    • 3
  • A. N. Schellekens
    • 4
    • 5
    • 6
  1. 1.Technische Univ. Wien Inst. für Theoretische PhysikViennaAustria
  2. 2.Theoretical Physics DivisionIoannina UniversityIoanninaGreece
  3. 3.I.N.F.N. — Sezione di Roma “Tor Vergata”RomaItaly
  4. 4.NIKHEFAmsterdamThe Netherlands
  5. 5.IMAPPRadboud Universiteit NijmegenNijmegenThe Netherlands
  6. 6.Instituto de Física FundamentalCSICMadridSpain