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arXiv · 0901.4350

Gauge Threshold Corrections for Local String Models

Joseph P. Conlon
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Abstract

We study gauge threshold corrections for local brane models embedded in a large compact space. A large bulk volume gives important contributions to the Konishi and super-Weyl anomalies and the effective field theory analysis implies the unification scale should be enhanced in a model-independent way from M_s to R M_s. For local D3/D3 models this result is supported by the explicit string computations. In this case the scale R M_s comes from the necessity of global cancellation of RR tadpoles sourced by the local model. We also study D3/D7 models and discuss discrepancies with the effective field theory analysis. We comment on phenomenological implications for gauge coupling unification and for the GUT scale.

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Joseph P. Conlon. 2009-02-20. Gauge Threshold Corrections for Local String Models. https://doi.org/10.1088/1126-6708%2F2009%2F04%2F059

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