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

Authors:Anastasopoulos, P.
Schellekens, A. N.
Keywords:Intersecting branes models, D-branes, Superstring Vacua
Issue Date:2010
Publisher:Springer
Citation:Journal of High Energy Physics 12: 1-33 (2010)
Abstract: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.
Description:33 páginas, 12 tablas.-- Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.-- et al.
Publisher version (URL):http://dx.doi.org/10.1007/JHEP12(2010)011
URI:http://hdl.handle.net/10261/43134
ISSN:1029-8479
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