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Suppressing the Cosmological Constant in Non-Supersymmetric Type I Strings
We construct non-supersymmetric type I string models which correspond to consistent flat-space solutions of all classical equations of motion. Moreover, the one-loop vacuum energy is naturally fixed by the size of compact extra dimensions which, in the two-dimensional case, can be lowered to a fract...
Autores principales: | , |
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Lenguaje: | eng |
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2003
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Acceso en línea: | https://dx.doi.org/10.1016/j.nuclphysb.2003.09.047 http://cds.cern.ch/record/630349 |
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author | Angelantonj, Carlo Antoniadis, Ignatios |
author_facet | Angelantonj, Carlo Antoniadis, Ignatios |
author_sort | Angelantonj, Carlo |
collection | CERN |
description | We construct non-supersymmetric type I string models which correspond to consistent flat-space solutions of all classical equations of motion. Moreover, the one-loop vacuum energy is naturally fixed by the size of compact extra dimensions which, in the two-dimensional case, can be lowered to a fraction of a millimetre. This class of models has interesting non-abelian gauge groups and can accommodate chiral fermions. In the large radius limit, supersymmetry is recovered in the bulk, while D-brane excitations, although non-supersymmetric, exhibit Fermi-Bose degeneracy at all mass levels. We also give some evidence for a suppression of higher-loop corrections to the vacuum energy. |
id | cern-630349 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2003 |
record_format | invenio |
spelling | cern-6303492023-03-14T20:38:30Zdoi:10.1016/j.nuclphysb.2003.09.047http://cds.cern.ch/record/630349engAngelantonj, CarloAntoniadis, IgnatiosSuppressing the Cosmological Constant in Non-Supersymmetric Type I StringsParticle Physics - TheoryWe construct non-supersymmetric type I string models which correspond to consistent flat-space solutions of all classical equations of motion. Moreover, the one-loop vacuum energy is naturally fixed by the size of compact extra dimensions which, in the two-dimensional case, can be lowered to a fraction of a millimetre. This class of models has interesting non-abelian gauge groups and can accommodate chiral fermions. In the large radius limit, supersymmetry is recovered in the bulk, while D-brane excitations, although non-supersymmetric, exhibit Fermi-Bose degeneracy at all mass levels. We also give some evidence for a suppression of higher-loop corrections to the vacuum energy.We construct non-supersymmetric type I string models which correspond to consistent flat-space solutions of all classical equations of motion. Moreover, the one-loop vacuum energy is naturally fixed by the size of compact extra dimensions which, in the two-dimensional case, can be lowered to a fraction of a millimetre. This class of models has interesting non-abelian gauge groups and can accommodate chiral fermions. In the large radius limit, supersymmetry is recovered in the bulk, while D-brane excitations, although non-supersymmetric, exhibit Fermi-Bose degeneracy at all mass levels. We also give some evidence for a suppression of higher-loop corrections to the vacuum energy.We construct non-supersymmetric type I string models which correspond to consistent flat-space solutions of all classical equations of motion. Moreover, the one-loop vacuum energy is naturally fixed by the size of compact extra dimensions which, in the two-dimensional case, can be lowered to a fraction of a millimetre. This class of models has interesting non-abelian gauge groups and can accommodate chiral fermions. In the large radius limit, supersymmetry is recovered in the bulk, while D-brane excitations, although non-supersymmetric, exhibit Fermi-Bose degeneracy at all mass levels. We also give some evidence for a suppression of higher-loop corrections to the vacuum energy.We construct non-supersymmetric type I string models which correspond to consistent flat-space solutions of all classical equations of motion. Moreover, the one-loop vacuum energy is naturally fixed by the size of compact extra dimensions which, in the two-dimensional case, can be lowered to a fraction of a millimetre. This class of models has interesting non-Abelian gauge groups and can accommodate chiral fermions. In the large-radius limit, supersymmetry is recovered in the bulk, while D-brane excitations, although non-supersymmetric, exhibit Fermi–Bose degeneracy at all mass levels. We also give some evidence for a suppression of higher-loop corrections to the vacuum energy.hep-th/0307254CERN-TH-2003-165CERN-TH-2003-165oai:cds.cern.ch:6303492003-07-25 |
spellingShingle | Particle Physics - Theory Angelantonj, Carlo Antoniadis, Ignatios Suppressing the Cosmological Constant in Non-Supersymmetric Type I Strings |
title | Suppressing the Cosmological Constant in Non-Supersymmetric Type I Strings |
title_full | Suppressing the Cosmological Constant in Non-Supersymmetric Type I Strings |
title_fullStr | Suppressing the Cosmological Constant in Non-Supersymmetric Type I Strings |
title_full_unstemmed | Suppressing the Cosmological Constant in Non-Supersymmetric Type I Strings |
title_short | Suppressing the Cosmological Constant in Non-Supersymmetric Type I Strings |
title_sort | suppressing the cosmological constant in non-supersymmetric type i strings |
topic | Particle Physics - Theory |
url | https://dx.doi.org/10.1016/j.nuclphysb.2003.09.047 http://cds.cern.ch/record/630349 |
work_keys_str_mv | AT angelantonjcarlo suppressingthecosmologicalconstantinnonsupersymmetrictypeistrings AT antoniadisignatios suppressingthecosmologicalconstantinnonsupersymmetrictypeistrings |