Tilt and Running of Cosmological Observables in Generalized Single-Field Inflation

Employing an effective field theory approach to inflationary perturbations, we analyze in detail the effect of curvature-generated Lagrangian operators on various observables, focusing on their running with scales. At quadratic order, we solve the equation of motion at next-to-leading leading order...

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Detalles Bibliográficos
Autores principales: Bartolo, Nicola, Fasiello, Matteo, Matarrese, Sabino, Riotto, Antonio
Lenguaje:eng
Publicado: 2010
Materias:
Astrophysics and Astronomy
Acceso en línea:https://dx.doi.org/10.1088/1475-7516/2010/12/026
http://cds.cern.ch/record/1301469
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author Bartolo, Nicola
Fasiello, Matteo
Matarrese, Sabino
Riotto, Antonio
author_facet Bartolo, Nicola
Fasiello, Matteo
Matarrese, Sabino
Riotto, Antonio
author_sort Bartolo, Nicola
collection CERN
description Employing an effective field theory approach to inflationary perturbations, we analyze in detail the effect of curvature-generated Lagrangian operators on various observables, focusing on their running with scales. At quadratic order, we solve the equation of motion at next-to-leading leading order in a generalized slow-roll approximation for a very general theory of single-field inflation. We derive the resulting power spectrum, its tilt and running. We then focus on the contribution to the primordial non-Gaussianity amplitude f_{NL} sourced by a specific interaction term. We show that the running of f_{NL} can be substantially larger than what dictated by the slow-roll parameters.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2010
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spelling cern-13014692023-03-15T19:12:05Zdoi:10.1088/1475-7516/2010/12/026http://cds.cern.ch/record/1301469engBartolo, NicolaFasiello, MatteoMatarrese, SabinoRiotto, AntonioTilt and Running of Cosmological Observables in Generalized Single-Field InflationAstrophysics and AstronomyEmploying an effective field theory approach to inflationary perturbations, we analyze in detail the effect of curvature-generated Lagrangian operators on various observables, focusing on their running with scales. At quadratic order, we solve the equation of motion at next-to-leading leading order in a generalized slow-roll approximation for a very general theory of single-field inflation. We derive the resulting power spectrum, its tilt and running. We then focus on the contribution to the primordial non-Gaussianity amplitude f_{NL} sourced by a specific interaction term. We show that the running of f_{NL} can be substantially larger than what dictated by the slow-roll parameters.Employing an effective field theory approach to inflationary perturbations, we analyze in detail the effect of curvature-generated Lagrangian operators on various observables, focusing on their running with scales. At quadratic order, we solve the equation of motion at next-to-leading leading order in a generalized slow-roll approximation for a very general theory of single-field inflation. We derive the resulting power spectrum, its tilt and running. We then focus on the contribution to the primordial non-Gaussianity amplitude f_{NL} sourced by a specific interaction term. We show that the running of f_{NL} can be substantially larger than what dictated by the slow-roll parameters.arXiv:1010.3993CERN-PH-TH-2010-238oai:cds.cern.ch:13014692010-10-20
spellingShingle Astrophysics and Astronomy
Bartolo, Nicola
Fasiello, Matteo
Matarrese, Sabino
Riotto, Antonio
Tilt and Running of Cosmological Observables in Generalized Single-Field Inflation
title Tilt and Running of Cosmological Observables in Generalized Single-Field Inflation
title_full Tilt and Running of Cosmological Observables in Generalized Single-Field Inflation
title_fullStr Tilt and Running of Cosmological Observables in Generalized Single-Field Inflation
title_full_unstemmed Tilt and Running of Cosmological Observables in Generalized Single-Field Inflation
title_short Tilt and Running of Cosmological Observables in Generalized Single-Field Inflation
title_sort tilt and running of cosmological observables in generalized single-field inflation
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1088/1475-7516/2010/12/026
http://cds.cern.ch/record/1301469
work_keys_str_mv AT bartolonicola tiltandrunningofcosmologicalobservablesingeneralizedsinglefieldinflation
AT fasiellomatteo tiltandrunningofcosmologicalobservablesingeneralizedsinglefieldinflation
AT matarresesabino tiltandrunningofcosmologicalobservablesingeneralizedsinglefieldinflation
AT riottoantonio tiltandrunningofcosmologicalobservablesingeneralizedsinglefieldinflation

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