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D-branes at singularities, compactification, and hypercharge

Matthew Buican1, Dmitry Malyshev1, David R. Morrison2,3, Herman Verlinde1 and Martijn Wijnholt1,4

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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 dP8 singularity, and present a geometric construction of a compact Calabi-Yau threefold with all the required topological properties.

Keywords

Superstring Vacua

Intersecting branes models

D-branes

 

E-print Number: hep-th/0610007

Cited: by |

Refers: to

PACS

11.25.Uv D branes

11.25.Mj Compactification and four-dimensional models

11.30.Fs Global symmetries (e.g., baryon number, lepton number)

11.15.-q Gauge field theories

12.10.-g Unified field theories and models

11.30.Qc Spontaneous and radiative symmetry breaking

Subjects

Particle physics and field theory

Dates

Issue 01 (January 2007)

Received 20 November 2006, accepted for publication 9 January 2007

Published 31 January 2007



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