D-branes at Singularities, Compactification, and Hypercharge
高能物理 - 理论
2010-10-27 v2
摘要
We report on progress towards the construction of SM-like gauge theories on the world-volume of D-branes at a Calabi-Yau singularity. In particular, we work out the topological conditions on the embedding of the singularity inside a compact CY threefold, that select hypercharge as the only light U(1) gauge factor. We apply this insight to the proposed open string realization of the SM of hep-th/0508089, based on a D3-brane at a dP_8 singularity, and present a geometric construction of a compact Calabi-Yau threefold with all the required topological properties. We comment on the relevance of D-instantons to the breaking of global U(1) symmetries.
引用
@article{arxiv.hep-th/0610007,
title = {D-branes at Singularities, Compactification, and Hypercharge},
author = {Matthew Buican and Dmitry Malyshev and David R. Morrison and Martijn Wijnholt and Herman Verlinde},
journal= {arXiv preprint arXiv:hep-th/0610007},
year = {2010}
}
备注
39 pages, 9 figures. Minor corrections