Implications of the scalar tilt for the tensor-to-scalar ratio
We investigate the possible implications of the measured value of the scalar tilt ns for the tensor-to-scalar ratio r in slow-roll, single-field inflationary models. The measured value of the tilt satisfies ns-1∼1/N∗, where N∗∼60 is the number of e-folds for observationally relevant scales. If this...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_15507998_v92_n12_p_Creminelli |
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todo:paper_15507998_v92_n12_p_Creminelli2023-10-03T16:25:12Z Implications of the scalar tilt for the tensor-to-scalar ratio Creminelli, P. Dubovsky, S. López Nacir, D. Simonović, M. Trevisan, G. Villadoro, G. Zaldarriaga, M. We investigate the possible implications of the measured value of the scalar tilt ns for the tensor-to-scalar ratio r in slow-roll, single-field inflationary models. The measured value of the tilt satisfies ns-1∼1/N∗, where N∗∼60 is the number of e-folds for observationally relevant scales. If this is not a coincidence and the scaling holds for different values of N, it strongly suggests that either r is as big as 10-1 (a possibility in tension with the recent data), or smaller than 10-2 and exponentially dependent on ns. A large region of the (ns,r) plane is not compatible with this scaling. © 2015 American Physical Society. Fil:López Nacir, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Zaldarriaga, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15507998_v92_n12_p_Creminelli |
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Universidad de Buenos Aires |
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I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
We investigate the possible implications of the measured value of the scalar tilt ns for the tensor-to-scalar ratio r in slow-roll, single-field inflationary models. The measured value of the tilt satisfies ns-1∼1/N∗, where N∗∼60 is the number of e-folds for observationally relevant scales. If this is not a coincidence and the scaling holds for different values of N, it strongly suggests that either r is as big as 10-1 (a possibility in tension with the recent data), or smaller than 10-2 and exponentially dependent on ns. A large region of the (ns,r) plane is not compatible with this scaling. © 2015 American Physical Society. |
| format |
JOUR |
| author |
Creminelli, P. Dubovsky, S. López Nacir, D. Simonović, M. Trevisan, G. Villadoro, G. Zaldarriaga, M. |
| spellingShingle |
Creminelli, P. Dubovsky, S. López Nacir, D. Simonović, M. Trevisan, G. Villadoro, G. Zaldarriaga, M. Implications of the scalar tilt for the tensor-to-scalar ratio |
| author_facet |
Creminelli, P. Dubovsky, S. López Nacir, D. Simonović, M. Trevisan, G. Villadoro, G. Zaldarriaga, M. |
| author_sort |
Creminelli, P. |
| title |
Implications of the scalar tilt for the tensor-to-scalar ratio |
| title_short |
Implications of the scalar tilt for the tensor-to-scalar ratio |
| title_full |
Implications of the scalar tilt for the tensor-to-scalar ratio |
| title_fullStr |
Implications of the scalar tilt for the tensor-to-scalar ratio |
| title_full_unstemmed |
Implications of the scalar tilt for the tensor-to-scalar ratio |
| title_sort |
implications of the scalar tilt for the tensor-to-scalar ratio |
| url |
http://hdl.handle.net/20.500.12110/paper_15507998_v92_n12_p_Creminelli |
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1807320865391509504 |