Kahler Moduli Inflation
We show that under general conditions there is at least one natural inflationary direction for the Kahler moduli of type IIB flux compactifications. This requires a Calabi-Yau which has h^{2,1}>h^{1,1}>2 and for which the structure of the scalar potential is as in the recently found ex...
| Main Authors: | , |
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| Format: | Journal article |
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2005
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| _version_ | 1797106377365127168 |
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| author | Conlon, J Quevedo, F |
| author_facet | Conlon, J Quevedo, F |
| author_sort | Conlon, J |
| collection | OXFORD |
| description | We show that under general conditions there is at least one natural inflationary direction for the Kahler moduli of type IIB flux compactifications. This requires a Calabi-Yau which has h^{2,1}>h^{1,1}>2 and for which the structure of the scalar potential is as in the recently found exponentially large volume compactifications. We also need - although these conditions may be relaxed - at least one Kahler modulus whose only non-vanishing triple-intersection is with itself and which appears by itself in the non-perturbative superpotential. Slow-roll inflation then occurs without a fine tuning of parameters, evading the eta problem of F-term inflation. In order to obtain COBE-normalised density perturbations, the stabilised volume of the Calabi-Yau must be O(10^5-10^7) in string units, and the inflationary scale M_{infl} ~ 10^{13} GeV. We find a robust model independent prediction for the spectral index of 1 - 2/N_e = 0.960 - 0.967, depending on the number of efoldings. |
| first_indexed | 2024-03-07T07:00:45Z |
| format | Journal article |
| id | oxford-uuid:ffac813c-73d6-4486-8746-9b022438fc6a |
| institution | University of Oxford |
| last_indexed | 2024-03-07T07:00:45Z |
| publishDate | 2005 |
| record_format | dspace |
| spelling | oxford-uuid:ffac813c-73d6-4486-8746-9b022438fc6a2022-03-27T13:46:41ZKahler Moduli InflationJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:ffac813c-73d6-4486-8746-9b022438fc6aSymplectic Elements at Oxford2005Conlon, JQuevedo, FWe show that under general conditions there is at least one natural inflationary direction for the Kahler moduli of type IIB flux compactifications. This requires a Calabi-Yau which has h^{2,1}>h^{1,1}>2 and for which the structure of the scalar potential is as in the recently found exponentially large volume compactifications. We also need - although these conditions may be relaxed - at least one Kahler modulus whose only non-vanishing triple-intersection is with itself and which appears by itself in the non-perturbative superpotential. Slow-roll inflation then occurs without a fine tuning of parameters, evading the eta problem of F-term inflation. In order to obtain COBE-normalised density perturbations, the stabilised volume of the Calabi-Yau must be O(10^5-10^7) in string units, and the inflationary scale M_{infl} ~ 10^{13} GeV. We find a robust model independent prediction for the spectral index of 1 - 2/N_e = 0.960 - 0.967, depending on the number of efoldings. |
| spellingShingle | Conlon, J Quevedo, F Kahler Moduli Inflation |
| title | Kahler Moduli Inflation |
| title_full | Kahler Moduli Inflation |
| title_fullStr | Kahler Moduli Inflation |
| title_full_unstemmed | Kahler Moduli Inflation |
| title_short | Kahler Moduli Inflation |
| title_sort | kahler moduli inflation |
| work_keys_str_mv | AT conlonj kahlermoduliinflation AT quevedof kahlermoduliinflation |