One-loop Yukawa Couplings in Local Models

Details One-loop Yukawa Couplings in Local Models One-loop Yukawa Couplings in Local Models

2010-07-29

arxiv.org/abs/1007.5145v1

JHEP 1011:087,2010

Physics

High Energy Physics

High Energy Physics - Theory

37 pages, 3 figures

Scientific paper

10.1007/JHEP11(2010)087

We calculate the one-loop Yukawa couplings and threshold corrections for supersymmetric local models of branes at singularities in type IIB string theory. We compute the corrections coming both from wavefunction and vertex renormalisation. The former comes in the IR from conventional field theory running and in the UV from threshold corrections that cause it to run from the winding scale associated to the full Calabi-Yau volume. The vertex correction is naively absent as it appears to correspond to superpotential renormalisation. However, we find that while the Wilsonian superpotential is not renormalised there is a physical vertex correction in the 1PI action associated to light particle loops.

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