Kähler moduli stabilization in semirealistic magnetized orbifold models KÄHLER MODULI STABILIZATION in SEMIREALISTIC ABE et al.

Hiroyuki Abe, Tatsuo Kobayashi, Keigo Sumita, Shohei Uemura

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    We study Kähler moduli stabilizations in semirealistic magnetized D-brane models based on Z2×Z2′ 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, Kähler moduli. The magnetic fluxes generate Fayet-Iliopoulos terms, which can fix ratios of Kähler 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.

    Original languageEnglish
    Article number026019
    JournalPhysical Review D
    Volume96
    Issue number2
    DOIs
    Publication statusPublished - 2017 Jul 15

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    stabilization
    instantons
    configurations
    ingredients
    fixing
    magnetic flux
    strings

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Cite this

    Kähler moduli stabilization in semirealistic magnetized orbifold models KÄHLER MODULI STABILIZATION in SEMIREALISTIC ABE et al. / Abe, Hiroyuki; Kobayashi, Tatsuo; Sumita, Keigo; Uemura, Shohei.

    In: Physical Review D, Vol. 96, No. 2, 026019, 15.07.2017.

    Research output: Contribution to journalArticle

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    abstract = "We study K{\"a}hler moduli stabilizations in semirealistic magnetized D-brane models based on Z2×Z2′ 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{\"a}hler moduli. The magnetic fluxes generate Fayet-Iliopoulos terms, which can fix ratios of K{\"a}hler 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.",
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