S-duality in string gas cosmology

Savas Arapoglu; Ata Karakci; Ali Kaya

doi:10.1016/j.physletb.2006.12.051

S-duality in string gas cosmology

Savas Arapoglu, Ata Karakci, Ali Kaya^*

^*Corresponding author for this work

Bogazici University

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

We consider a toy cosmological model in string theory involving the winding and momentum modes of (m, n) strings, i.e. bound states of m fundamental and n D-strings. The model is invariant under S-duality provided that m and n are interchanged. The dilaton is naturally stabilized due to S-duality invariance, which offers a new mechanism of moduli fixing in string gas cosmology. Using a tachyon field rolling down to its ground state, we also point out a possible way of realizing a cosmological phase with decreasing Hubble radius and constant dilaton.

Original language	English
Pages (from-to)	255-260
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	645
Issue number	2-3
DOIs	https://doi.org/10.1016/j.physletb.2006.12.051
Publication status	Published - 8 Feb 2007
Externally published	Yes

Funding

The work of Ali Kaya is partially supported by Turkish Academy of Sciences via Young Investigator Award Program (TÜBA-GEBİP).

Funders	Funder number
Türkiye Bilimler Akademisi

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10.1016/j.physletb.2006.12.051

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AB - We consider a toy cosmological model in string theory involving the winding and momentum modes of (m, n) strings, i.e. bound states of m fundamental and n D-strings. The model is invariant under S-duality provided that m and n are interchanged. The dilaton is naturally stabilized due to S-duality invariance, which offers a new mechanism of moduli fixing in string gas cosmology. Using a tachyon field rolling down to its ground state, we also point out a possible way of realizing a cosmological phase with decreasing Hubble radius and constant dilaton.

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S-duality in string gas cosmology

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