φ2 inflation at its endpoint
In the simplest inflationary model V=12m2φ2, we provide a prediction accurate up to 1% for the spectral index ns and the tensor-to-scalar ratio r assuming instantaneous reheating and a standard thermal history: ns=0.9668±0.0003 and r=0.131±0.001. This represents the simplest and most informative poi...
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todo:paper_15507998_v90_n8_p_Creminelli2023-10-03T16:25:04Z φ2 inflation at its endpoint Creminelli, P. Nacir, D.L. Simonović, M. Trevisan, G. Zaldarriaga, M. In the simplest inflationary model V=12m2φ2, we provide a prediction accurate up to 1% for the spectral index ns and the tensor-to-scalar ratio r assuming instantaneous reheating and a standard thermal history: ns=0.9668±0.0003 and r=0.131±0.001. This represents the simplest and most informative point in the (ns,r) plane. The result is independent of the details of reheating (or preheating) provided the conversion to radiation is sufficiently fast. A slower reheating or a modified postinflationary evolution (with an equation of state parameter w≤1/3) pushes towards smaller ns (and larger r), so that our prediction corresponds to the maximum ns (and minimum r) for the quadratic potential. We also derive similar results for a general V∞φp potential. © 2014 American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15507998_v90_n8_p_Creminelli |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
In the simplest inflationary model V=12m2φ2, we provide a prediction accurate up to 1% for the spectral index ns and the tensor-to-scalar ratio r assuming instantaneous reheating and a standard thermal history: ns=0.9668±0.0003 and r=0.131±0.001. This represents the simplest and most informative point in the (ns,r) plane. The result is independent of the details of reheating (or preheating) provided the conversion to radiation is sufficiently fast. A slower reheating or a modified postinflationary evolution (with an equation of state parameter w≤1/3) pushes towards smaller ns (and larger r), so that our prediction corresponds to the maximum ns (and minimum r) for the quadratic potential. We also derive similar results for a general V∞φp potential. © 2014 American Physical Society. |
| format |
JOUR |
| author |
Creminelli, P. Nacir, D.L. Simonović, M. Trevisan, G. Zaldarriaga, M. |
| spellingShingle |
Creminelli, P. Nacir, D.L. Simonović, M. Trevisan, G. Zaldarriaga, M. φ2 inflation at its endpoint |
| author_facet |
Creminelli, P. Nacir, D.L. Simonović, M. Trevisan, G. Zaldarriaga, M. |
| author_sort |
Creminelli, P. |
| title |
φ2 inflation at its endpoint |
| title_short |
φ2 inflation at its endpoint |
| title_full |
φ2 inflation at its endpoint |
| title_fullStr |
φ2 inflation at its endpoint |
| title_full_unstemmed |
φ2 inflation at its endpoint |
| title_sort |
φ2 inflation at its endpoint |
| url |
http://hdl.handle.net/20.500.12110/paper_15507998_v90_n8_p_Creminelli |
| work_keys_str_mv |
AT creminellip ph2inflationatitsendpoint AT nacirdl ph2inflationatitsendpoint AT simonovicm ph2inflationatitsendpoint AT trevisang ph2inflationatitsendpoint AT zaldarriagam ph2inflationatitsendpoint |
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1807322003222298624 |