Modified hybrid inflation in no-scale SUGRA with suppressed $R$-symmetry breaking
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arXiv
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866909498582499328 |
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| author | Wan, Qian Zhang, Da-Xin |
| author_facet | Wan, Qian Zhang, Da-Xin |
| contents | A well-motivated cosmological hybrid inflation scenario based on no-scale SUGRA is considered. It is demonstrated that an extra suppressed $R$-symmetry breaking term $S^n$ with $n\geq 4$ needs to be included in order to realize successful inflation. The resulting potential is found to be similar (but not identical) to the one in the Starobinsky inflation model. A relatively larger tensor-to-scalar ratio $r\sim 10^{-2}$ and a spectral index $n_s\approx 0.965$ are obtained, which are approximately independent of $n$. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2407_05702 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Modified hybrid inflation in no-scale SUGRA with suppressed $R$-symmetry breaking Wan, Qian Zhang, Da-Xin High Energy Physics - Phenomenology A well-motivated cosmological hybrid inflation scenario based on no-scale SUGRA is considered. It is demonstrated that an extra suppressed $R$-symmetry breaking term $S^n$ with $n\geq 4$ needs to be included in order to realize successful inflation. The resulting potential is found to be similar (but not identical) to the one in the Starobinsky inflation model. A relatively larger tensor-to-scalar ratio $r\sim 10^{-2}$ and a spectral index $n_s\approx 0.965$ are obtained, which are approximately independent of $n$. |
| title | Modified hybrid inflation in no-scale SUGRA with suppressed $R$-symmetry breaking |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2407.05702 |