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Intersecting brane worlds on tori and orbifolds
Author(s) -
Blumenhagen Ralph,
Körs Boris,
Lüst Dieter,
Ott Tassilo
Publication year - 2002
Publication title -
fortschritte der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.469
H-Index - 71
eISSN - 1521-3978
pISSN - 0015-8208
DOI - 10.1002/1521-3978(200209)50:8/9<843::aid-prop843>3.0.co;2-v
Subject(s) - orbifold , physics , theoretical physics , brane , string theory , extra dimensions , moduli , homogeneous space , phenomenology (philosophy) , supersymmetry , moduli space , gravitation , brane cosmology , particle physics , classical mechanics , geometry , mathematics , quantum mechanics , philosophy , epistemology
We review the construction and phenomenology of intersecting brane worlds. The breaking of chiral and supersymmetry together with a reduction of gauge symmetry by introducing D‐branes at generic angles into type I or type II string compactifications is taken as a starting point for the engineering of phenomenologically appealing four‐dimensional vacua. Examples that come very close to Standard Model and GUT physics are considered and issues like the cancellation of anomalies and the emergence of global symmetries studied in some detail. Concerning the gravitational backreaction, the perturbative potential generated at the disc level is shown to lead to a run‐away instability of geometric moduli within the purely toroidal compactifications. It can at least partly be avoided in certain orbifold vacua, where the relevant moduli are frozen. These more restricted models still possess sufficient freedom to find semi‐realistic brane world orbifolds.