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...
| Publicado: |
2014
|
|---|---|
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v90_n8_p_Creminelli http://hdl.handle.net/20.500.12110/paper_15507998_v90_n8_p_Creminelli |
| Aporte de: |
| id |
paper:paper_15507998_v90_n8_p_Creminelli |
|---|---|
| record_format |
dspace |
| spelling |
paper:paper_15507998_v90_n8_p_Creminelli2023-06-08T16:22:49Z 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 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. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v90_n8_p_Creminelli 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. |
| title |
φ2 inflation at its endpoint |
| spellingShingle |
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 |
| publishDate |
2014 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v90_n8_p_Creminelli http://hdl.handle.net/20.500.12110/paper_15507998_v90_n8_p_Creminelli |
| _version_ |
1768546509629947904 |