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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Detalles Bibliográficos
Autores principales: López Nacir, Diana Laura, Zaldarriaga, Matias
Publicado: 2015
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v92_n12_p_Creminelli
http://hdl.handle.net/20.500.12110/paper_15507998_v92_n12_p_Creminelli
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_15507998_v92_n12_p_Creminelli2023-06-08T16:22:55Z Implications of the scalar tilt for the tensor-to-scalar ratio López Nacir, Diana Laura Zaldarriaga, Matias 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. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v92_n12_p_Creminelli http://hdl.handle.net/20.500.12110/paper_15507998_v92_n12_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 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.
author López Nacir, Diana Laura
Zaldarriaga, Matias
spellingShingle López Nacir, Diana Laura
Zaldarriaga, Matias
Implications of the scalar tilt for the tensor-to-scalar ratio
author_facet López Nacir, Diana Laura
Zaldarriaga, Matias
author_sort López Nacir, Diana Laura
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
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v92_n12_p_Creminelli
http://hdl.handle.net/20.500.12110/paper_15507998_v92_n12_p_Creminelli
work_keys_str_mv AT lopeznacirdianalaura implicationsofthescalartiltforthetensortoscalarratio
AT zaldarriagamatias implicationsofthescalartiltforthetensortoscalarratio
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