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Gauge threshold corrections for local string models
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DOI：10.1088/1126-6708/2009/04/059.png)
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摘要
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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 RMs. For local D3/D3 models this result is supported by the explicit string computations. In this case the scale RMs 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.
Keyword:
Strings and branes phenomenology
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IF:
5.5
论文数:
4.0W
被引数:
13.7W
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