One-loop bosonic string and de Sitter space

One-loop bosonic string and de Sitter space

We calculate the bosonic string one-loop three- and four-point amplitudes to quadradic order in momentum, and we read off the one-loop low-energy two-derivative effective action for the massless fields, Seff. Treating the renormalized one-loop vacuum energy as a tunable parameter and extrapolating t...

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Main Authors: Sabine Harribey, Dimitrios Tsimpis
Format: Article
Language:English
Published: Elsevier 2019-11-01
Series:Nuclear Physics B
Online Access:http://www.sciencedirect.com/science/article/pii/S0550321319302548
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spelling doaj-ecb764d5183942ca9e83138b6626a47b2020-11-25T01:31:27ZengElsevierNuclear Physics B0550-32132019-11-01948One-loop bosonic string and de Sitter spaceSabine Harribey0Dimitrios Tsimpis1Centre de Physique Théorique, École Polytechnique, 91128 Palaiseau Cedex, France; École Normale Supérieure de Lyon, 46 Allée d'Italie, 69007 Lyon, FranceUniversité de Lyon, UCBL, Institut de Physique Nucléaire de Lyon, UMR 5822, CNRS/IN2P3, 4 rue Enrico Fermi, 69622 Villeurbanne Cedex, France; Corresponding author.We calculate the bosonic string one-loop three- and four-point amplitudes to quadradic order in momentum, and we read off the one-loop low-energy two-derivative effective action for the massless fields, Seff. Treating the renormalized one-loop vacuum energy as a tunable parameter and extrapolating to a supercritical dimension D>26, one can reach a regime where the one-loop couplings in Seff are of the same order as the tree-level ones while all higher-loop corrections are negligible. Moreover the effective spacetime curvature is small in string units. We show that the effective action thus obtained admits weakly-curved de Sitter solutions with constant dilaton at small string coupling.http://www.sciencedirect.com/science/article/pii/S0550321319302548
collection DOAJ
language English
format Article
sources DOAJ
author Sabine Harribey
Dimitrios Tsimpis
spellingShingle Sabine Harribey
Dimitrios Tsimpis
One-loop bosonic string and de Sitter space
Nuclear Physics B
author_facet Sabine Harribey
Dimitrios Tsimpis
author_sort Sabine Harribey
title One-loop bosonic string and de Sitter space
title_short One-loop bosonic string and de Sitter space
title_full One-loop bosonic string and de Sitter space
title_fullStr One-loop bosonic string and de Sitter space
title_full_unstemmed One-loop bosonic string and de Sitter space
title_sort one-loop bosonic string and de sitter space
publisher Elsevier
series Nuclear Physics B
issn 0550-3213
publishDate 2019-11-01
description We calculate the bosonic string one-loop three- and four-point amplitudes to quadradic order in momentum, and we read off the one-loop low-energy two-derivative effective action for the massless fields, Seff. Treating the renormalized one-loop vacuum energy as a tunable parameter and extrapolating to a supercritical dimension D>26, one can reach a regime where the one-loop couplings in Seff are of the same order as the tree-level ones while all higher-loop corrections are negligible. Moreover the effective spacetime curvature is small in string units. We show that the effective action thus obtained admits weakly-curved de Sitter solutions with constant dilaton at small string coupling.
url http://www.sciencedirect.com/science/article/pii/S0550321319302548
work_keys_str_mv AT sabineharribey oneloopbosonicstringanddesitterspace
AT dimitriostsimpis oneloopbosonicstringanddesitterspace
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