Volume Modulus Inflation and the Gravitino Mass Problem
The Hubble constant during the last stages of inflation in a broad class of models based on the KKLT mechanism should be smaller than the gravitino mass, H <~ m_{3/2}. We point out that in the models with large volume of compactification the corresponding constraint typically is even stronger...
| Príomhchruthaitheoirí: | , , , |
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| Formáid: | Journal article |
| Foilsithe / Cruthaithe: |
2008
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| _version_ | 1826291142378913792 |
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| author | Conlon, J Kallosh, R Linde, A Quevedo, F |
| author_facet | Conlon, J Kallosh, R Linde, A Quevedo, F |
| author_sort | Conlon, J |
| collection | OXFORD |
| description | The Hubble constant during the last stages of inflation in a broad class of models based on the KKLT mechanism should be smaller than the gravitino mass, H <~ m_{3/2}. We point out that in the models with large volume of compactification the corresponding constraint typically is even stronger, H <~ m_{3/2}^{3/2}, in Planck units. In order to address this problem, we propose a class of models with large volume of compactification where inflation may occur exponentially far away from the present vacuum state. In these models, the Hubble constant during inflation can be many orders of magnitude greater than the gravitino mass. We introduce a toy model describing this scenario, and discuss its strengths and weaknesses. |
| first_indexed | 2024-03-07T02:54:57Z |
| format | Journal article |
| id | oxford-uuid:aef33911-37f9-4796-9289-1abee3975e84 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T02:54:57Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:aef33911-37f9-4796-9289-1abee3975e842022-03-27T03:46:14ZVolume Modulus Inflation and the Gravitino Mass ProblemJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:aef33911-37f9-4796-9289-1abee3975e84Symplectic Elements at Oxford2008Conlon, JKallosh, RLinde, AQuevedo, FThe Hubble constant during the last stages of inflation in a broad class of models based on the KKLT mechanism should be smaller than the gravitino mass, H <~ m_{3/2}. We point out that in the models with large volume of compactification the corresponding constraint typically is even stronger, H <~ m_{3/2}^{3/2}, in Planck units. In order to address this problem, we propose a class of models with large volume of compactification where inflation may occur exponentially far away from the present vacuum state. In these models, the Hubble constant during inflation can be many orders of magnitude greater than the gravitino mass. We introduce a toy model describing this scenario, and discuss its strengths and weaknesses. |
| spellingShingle | Conlon, J Kallosh, R Linde, A Quevedo, F Volume Modulus Inflation and the Gravitino Mass Problem |
| title | Volume Modulus Inflation and the Gravitino Mass Problem |
| title_full | Volume Modulus Inflation and the Gravitino Mass Problem |
| title_fullStr | Volume Modulus Inflation and the Gravitino Mass Problem |
| title_full_unstemmed | Volume Modulus Inflation and the Gravitino Mass Problem |
| title_short | Volume Modulus Inflation and the Gravitino Mass Problem |
| title_sort | volume modulus inflation and the gravitino mass problem |
| work_keys_str_mv | AT conlonj volumemodulusinflationandthegravitinomassproblem AT kalloshr volumemodulusinflationandthegravitinomassproblem AT lindea volumemodulusinflationandthegravitinomassproblem AT quevedof volumemodulusinflationandthegravitinomassproblem |