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Departamento de Gravitación y Teoría de CamposSeminarios 2010 |
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Instituto de Ciencias Nucleares, UNAM |
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Departamento de Gravitación y Teoría de CamposSeminarios 2010 |
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Instituto de Ciencias Nucleares, UNAM |
Jueves 26 de Agosto, a las 17:30 hrs en el Auditorio Principal del ICN
Wolfgang Bietenholz (ICN)
Naturally Light Fermions from Dimensional Reduction
| We explore a scenario to obtain light fermions - far below the cutoff scale - in a natural way, without fine tuning on the non-perturbative level. As a toy model, we consider the 3d Gross-Neveu model in the broken phase and construct a stable brane world by means of a brane and an anti-brane. Fermions of opposite chirality are localised on the branes. At a large brane separation the 2d correlation length diverges exponentially, hence an observer on the brane perceives just a 2d space-time. In his world the asymptotic freedom of the 2d model arises, hence this mechanism provides criticality in a natural way, though with a restrictive occupation condition. |
