Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2012-02-22
Physics
High Energy Physics
High Energy Physics - Theory
8 pages. Proceedings of the "XVII European Workshop on String Theory 2011", Padova, Italy, 5-9 September 2011
Scientific paper
E3-instantons that generate non-perturbative superpotentials in IIB N=1 compactifications are more frequent than currently believed. Worldvolume fluxes will typically lift the E3-brane geometric moduli and their fermionic superpartners, leaving only the two required universal fermionic zero-modes. We consistently incorporate SL(2, Z) monodromies and world-volume fluxes in the effective theory of the E3-brane fermions and study the resulting zero-mode spectrum, highlighting the relation between F-theory and perturbative IIB results. This leads us to a IIB derivation of the index for generation of superpotential terms, which reproduces and generalizes available results. Furthermore, we show how worldvolume fluxes can be explicitly constructed in a one-modulus compactification, such that an E3-instanton has exactly two fermonic zero-modes. This construction is readily applicable to numerous scenarios.
Bianchi Massimo
Collinucci Andres
Martucci Luca
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