Gravity waves and gravitino dark matter in μ-hybrid inflation
We propose a novel reformulation of supersymmetric (more precisely μ-) hybrid inflation based on a local U(1) or any suitable extension of the minimal supersymmetric standard model (MSSM) which also resolves the μ problem. We employ a suitable Kahler potential which effectively yields quartic inflat...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2018-12-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269318308281 |
| _version_ | 1819295257882263552 |
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| author | Nobuchika Okada Qaisar Shafi |
| author_facet | Nobuchika Okada Qaisar Shafi |
| author_sort | Nobuchika Okada |
| collection | DOAJ |
| description | We propose a novel reformulation of supersymmetric (more precisely μ-) hybrid inflation based on a local U(1) or any suitable extension of the minimal supersymmetric standard model (MSSM) which also resolves the μ problem. We employ a suitable Kahler potential which effectively yields quartic inflation with non-minimal coupling to gravity. Imposing the gravitino Big Bang Nucleosynthesis (BBN) constraint on the reheat temperature (Tr≲106 GeV) and requiring a neutralino LSP, the tensor to scalar ratio (r) has a lower bound r≳0.004. The U(1) symmetry breaking scale lies between 108 and 1012 GeV. We also discuss a scenario with gravitino dark matter whose mass is a few GeV. |
| first_indexed | 2024-12-24T04:39:21Z |
| format | Article |
| id | doaj.art-a84e2fd8d10a425cb890e876911e2905 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-24T04:39:21Z |
| publishDate | 2018-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-a84e2fd8d10a425cb890e876911e29052022-12-21T17:14:56ZengElsevierPhysics Letters B0370-26932018-12-01787141145Gravity waves and gravitino dark matter in μ-hybrid inflationNobuchika Okada0Qaisar Shafi1Department of Physics and Astronomy, University of Alabama, Tuscaloosa, AL 35487, USA; Corresponding author.Bartol Research Institute, Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USAWe propose a novel reformulation of supersymmetric (more precisely μ-) hybrid inflation based on a local U(1) or any suitable extension of the minimal supersymmetric standard model (MSSM) which also resolves the μ problem. We employ a suitable Kahler potential which effectively yields quartic inflation with non-minimal coupling to gravity. Imposing the gravitino Big Bang Nucleosynthesis (BBN) constraint on the reheat temperature (Tr≲106 GeV) and requiring a neutralino LSP, the tensor to scalar ratio (r) has a lower bound r≳0.004. The U(1) symmetry breaking scale lies between 108 and 1012 GeV. We also discuss a scenario with gravitino dark matter whose mass is a few GeV.http://www.sciencedirect.com/science/article/pii/S0370269318308281 |
| spellingShingle | Nobuchika Okada Qaisar Shafi Gravity waves and gravitino dark matter in μ-hybrid inflation Physics Letters B |
| title | Gravity waves and gravitino dark matter in μ-hybrid inflation |
| title_full | Gravity waves and gravitino dark matter in μ-hybrid inflation |
| title_fullStr | Gravity waves and gravitino dark matter in μ-hybrid inflation |
| title_full_unstemmed | Gravity waves and gravitino dark matter in μ-hybrid inflation |
| title_short | Gravity waves and gravitino dark matter in μ-hybrid inflation |
| title_sort | gravity waves and gravitino dark matter in μ hybrid inflation |
| url | http://www.sciencedirect.com/science/article/pii/S0370269318308281 |
| work_keys_str_mv | AT nobuchikaokada gravitywavesandgravitinodarkmatterinmhybridinflation AT qaisarshafi gravitywavesandgravitinodarkmatterinmhybridinflation |