String theory and the first half of the universe

We perform a detailed study of stringy moduli-driven cosmologies between the end of inflation and the commencement of the Hot Big Bang, including both the background and cosmological perturbations: a period that can cover half the lifetime of the universe on a logarithmic scale. Compared to the stan...

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Auteurs principaux: Apers, F, Conlon, JP, Copeland, EJ, Mosny, M, Revello, F
Format: Journal article
Langue:English
Publié: IOP Publishing 2024
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author Apers, F
Conlon, JP
Copeland, EJ
Mosny, M
Revello, F
author_facet Apers, F
Conlon, JP
Copeland, EJ
Mosny, M
Revello, F
author_sort Apers, F
collection OXFORD
description We perform a detailed study of stringy moduli-driven cosmologies between the end of inflation and the commencement of the Hot Big Bang, including both the background and cosmological perturbations: a period that can cover half the lifetime of the universe on a logarithmic scale. Compared to the standard cosmology, stringy cosmologies with vacua that address the hierarchy problem motivate extended kination, tracker and moduli-dominated epochs involving significantly trans-Planckian field excursions. We analyse the cosmology within the framework of the Large Volume Scenario but explain how analogous cosmological features are expected in other string theory models characterized by final vacua located in the asymptotic regions of moduli space. Conventional effective field theory is unable to control Planck-suppressed operators and so such epochs require a stringy completion for a consistent analysis. Perturbation growth in these stringy cosmologies is substantially enhanced compared to conventional cosmological histories. The transPlanckian field evolution results in radical changes to Standard Model couplings during this history and we outline potential applications to baryogenesis, dark matter and gravitational wave production.
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spelling oxford-uuid:f79da13f-b7e1-4567-99b3-1a153cecec092025-01-22T10:53:33ZString theory and the first half of the universeJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f79da13f-b7e1-4567-99b3-1a153cecec09EnglishSymplectic ElementsIOP Publishing2024Apers, FConlon, JPCopeland, EJMosny, MRevello, FWe perform a detailed study of stringy moduli-driven cosmologies between the end of inflation and the commencement of the Hot Big Bang, including both the background and cosmological perturbations: a period that can cover half the lifetime of the universe on a logarithmic scale. Compared to the standard cosmology, stringy cosmologies with vacua that address the hierarchy problem motivate extended kination, tracker and moduli-dominated epochs involving significantly trans-Planckian field excursions. We analyse the cosmology within the framework of the Large Volume Scenario but explain how analogous cosmological features are expected in other string theory models characterized by final vacua located in the asymptotic regions of moduli space. Conventional effective field theory is unable to control Planck-suppressed operators and so such epochs require a stringy completion for a consistent analysis. Perturbation growth in these stringy cosmologies is substantially enhanced compared to conventional cosmological histories. The transPlanckian field evolution results in radical changes to Standard Model couplings during this history and we outline potential applications to baryogenesis, dark matter and gravitational wave production.
spellingShingle Apers, F
Conlon, JP
Copeland, EJ
Mosny, M
Revello, F
String theory and the first half of the universe
title String theory and the first half of the universe
title_full String theory and the first half of the universe
title_fullStr String theory and the first half of the universe
title_full_unstemmed String theory and the first half of the universe
title_short String theory and the first half of the universe
title_sort string theory and the first half of the universe
work_keys_str_mv AT apersf stringtheoryandthefirsthalfoftheuniverse
AT conlonjp stringtheoryandthefirsthalfoftheuniverse
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AT mosnym stringtheoryandthefirsthalfoftheuniverse
AT revellof stringtheoryandthefirsthalfoftheuniverse