One-loop Yukawa Couplings in Local Models

Abstract

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.

37 pages, 3 figures

References in corpus (10)

• GUTs and Exceptional Branes in F-theory - II: Experimental Predictions
• Realistic Yukawa Couplings through Instantons in Intersecting Brane Worlds
• String predictions for near future colliders from one-loop scattering amplitudes around D-brane worlds
• Thresholds for Intersecting D-branes Revisited
• Gauge Threshold Corrections for Local String Models
• Gauge Threshold Corrections for Local Orientifolds
• Gauge Thresholds and Kaehler Metrics for Rigid Intersecting D-brane Models
• Intersecting Brane Worlds at One Loop
• Two-Point Functions of Chiral Fields at One Loop in Type II
• Noncommutativity from the string perspective: modification of gravity at a mm without mm sized extra dimensions