K\"ahler moduli stabilization in semi-realistic magnetized orbifold models
Abstract
We study K\"ahler moduli stabilizations in semi-realistic magnetized D-brane models based on toroidal orbifolds. In type IIB compactifications, 3-form fluxes can stabilize the dilaton and complex structure moduli fields, but there remain some massless closed string moduli fields, K\"ahler moduli. The magnetic fluxes generate Fayet-Iliopoulos terms, which can fix ratios of K\"ahler moduli. On top of that, we consider D-brane instanton effects to stabilize them in concrete D-brane models and investigate the brane configurations to confirm that the moduli fields can be stabilized successfully. In this paper, we treat two types of D-brane models. One is based on D9-brane systems respecting the Pati-Salam model. The other is realized in a D7-brane system breaking the Pati-Salam gauge group. We find suitable configurations where the D-brane instantons can stabilize the moduli fields within both types of D-brane models, explaining an origin of a small constant term of the superpotential which is a key ingredient for successful moduli stabilizations.
Cite
@article{arxiv.1703.03402,
title = {K\"ahler moduli stabilization in semi-realistic magnetized orbifold models},
author = {Hiroyuki Abe and Tatsuo Kobayashi and Keigo Sumita and Shohei Uemura},
journal= {arXiv preprint arXiv:1703.03402},
year = {2017}
}
Comments
21 pages, 2 figures