Cosmological α′-corrections from the functional renormalization group

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Cosmological α′-corrections from the functional renormalization group. / Basile, Ivano; Platania, Alessia.

I: Journal of High Energy Physics, Bind 2021, Nr. 6, 45, 06.2021.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Basile, I & Platania, A 2021, 'Cosmological α′-corrections from the functional renormalization group', Journal of High Energy Physics, bind 2021, nr. 6, 45. https://doi.org/10.1007/JHEP06(2021)045

APA

Basile, I., & Platania, A. (2021). Cosmological α′-corrections from the functional renormalization group. Journal of High Energy Physics, 2021(6), [45]. https://doi.org/10.1007/JHEP06(2021)045

Vancouver

Basile I, Platania A. Cosmological α′-corrections from the functional renormalization group. Journal of High Energy Physics. 2021 jun.;2021(6). 45. https://doi.org/10.1007/JHEP06(2021)045

Author

Basile, Ivano ; Platania, Alessia. / Cosmological α′-corrections from the functional renormalization group. I: Journal of High Energy Physics. 2021 ; Bind 2021, Nr. 6.

Bibtex

@article{b62a522feb5441618138b877aac4ae9b,
title = "Cosmological α′-corrections from the functional renormalization group",
abstract = "We employ the techniques of the Functional Renormalization Group in string theory, in order to derive an effective mini-superspace action for cosmological backgrounds to all orders in the string scale α′. To this end, T-duality plays a crucial role, classifying all perturbative curvature corrections in terms of a single function of the Hubble parameter. The resulting renormalization group equations admit an exact, albeit non-analytic, solution in any spacetime dimension D, which is however incompatible with Einstein gravity at low energies. Within an E-expansion about D = 2, we also find an analytic solution which exhibits a non-Gaussian ultraviolet fixed point with positive Newton coupling, as well as an acceptable low-energy limit. Yet, within polynomial truncations of the full theory space, we find no evidence for an analog of this solution in D = 4. Finally, we comment on potential cosmological implications of our findings.",
keywords = "Cosmology of Theories beyond the SM, Nonperturbative Effects, Renormalization Group, String Duality",
author = "Ivano Basile and Alessia Platania",
note = "Publisher Copyright: {\textcopyright} 2021, The Author(s).",
year = "2021",
month = jun,
doi = "10.1007/JHEP06(2021)045",
language = "English",
volume = "2021",
journal = "Journal of High Energy Physics (Online)",
issn = "1126-6708",
publisher = "Springer",
number = "6",

}

RIS

TY - JOUR

T1 - Cosmological α′-corrections from the functional renormalization group

AU - Basile, Ivano

AU - Platania, Alessia

N1 - Publisher Copyright: © 2021, The Author(s).

PY - 2021/6

Y1 - 2021/6

N2 - We employ the techniques of the Functional Renormalization Group in string theory, in order to derive an effective mini-superspace action for cosmological backgrounds to all orders in the string scale α′. To this end, T-duality plays a crucial role, classifying all perturbative curvature corrections in terms of a single function of the Hubble parameter. The resulting renormalization group equations admit an exact, albeit non-analytic, solution in any spacetime dimension D, which is however incompatible with Einstein gravity at low energies. Within an E-expansion about D = 2, we also find an analytic solution which exhibits a non-Gaussian ultraviolet fixed point with positive Newton coupling, as well as an acceptable low-energy limit. Yet, within polynomial truncations of the full theory space, we find no evidence for an analog of this solution in D = 4. Finally, we comment on potential cosmological implications of our findings.

AB - We employ the techniques of the Functional Renormalization Group in string theory, in order to derive an effective mini-superspace action for cosmological backgrounds to all orders in the string scale α′. To this end, T-duality plays a crucial role, classifying all perturbative curvature corrections in terms of a single function of the Hubble parameter. The resulting renormalization group equations admit an exact, albeit non-analytic, solution in any spacetime dimension D, which is however incompatible with Einstein gravity at low energies. Within an E-expansion about D = 2, we also find an analytic solution which exhibits a non-Gaussian ultraviolet fixed point with positive Newton coupling, as well as an acceptable low-energy limit. Yet, within polynomial truncations of the full theory space, we find no evidence for an analog of this solution in D = 4. Finally, we comment on potential cosmological implications of our findings.

KW - Cosmology of Theories beyond the SM

KW - Nonperturbative Effects

KW - Renormalization Group

KW - String Duality

UR - http://www.scopus.com/inward/record.url?scp=85107577144&partnerID=8YFLogxK

U2 - 10.1007/JHEP06(2021)045

DO - 10.1007/JHEP06(2021)045

M3 - Journal article

AN - SCOPUS:85107577144

VL - 2021

JO - Journal of High Energy Physics (Online)

JF - Journal of High Energy Physics (Online)

SN - 1126-6708

IS - 6

M1 - 45

ER -

ID: 388513162