منابع مشابه
Chiral Fermions from Manifolds Of G2 Holonomy
M -theory compactification on a manifold X of G2 holonomy can give chiral fermions in four dimensions only if X is singular. A number of examples of conical singularity that give chiral fermions are known; the present paper is devoted to describing some additional examples. In some of them, the physics can be determined but the metric is not known explicitly, while in others the metric can be d...
متن کاملDeformations in G2 Manifolds
Here we study the deformations of associative submanifolds inside a G2 manifold M 7 with a calibration 3-form φ. A choice of 2-plane field Λ on M (which always exists) splits the tangent bundle of M as a direct sum of a 3-dimensional associate bundle and a complex 4-plane bundle TM = E ⊕ V, and this helps us to relate the deformations to SeibergWitten type equations. Here all the surveyed resul...
متن کاملAnomaly Cancellation On G2-Manifolds
Smooth manifolds of G2 holonomy, used to compactify M -theory to four dimensions, give only abelian gauge groups without charged matter multiplets. But singular G2-manifolds can give abelian or nonabelian gauge groups with chiral fermions. We describe the mechanism of anomaly cancellation in these models, using anomaly inflow from the bulk. We also compare the anomaly predictions to what has be...
متن کاملSuperconformal Field Theories for Compact G2 Manifolds
We present the construction of exactly solvable superconformal field theories describing Type II string models compactified on compact G2 manifolds. These models are defined by anti-holomorphic quotients of the form (CY×S)/ZZ2, where we realize the Calabi-Yau as a Gepner model. In the superconformal field theory the ZZ2 acts as charge conjugation implying that the representation theory of a W(2...
متن کاملDuality and Fibrations on G2 Manifolds
We argue that G2 manifolds for M-theory admitting string theory Calabi-Yau duals are fibered by coassociative submanifolds. Dual theories are constructed using the moduli space of M5-brane fibers as target space. Mirror symmetry and various string and M-theory dualities involving G2 manifolds may be incorporated into this framework. To give some examples, we construct two noncompact manifolds w...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2002
ISSN: 0550-3213
DOI: 10.1016/s0550-3213(02)00612-0