Large volume susy breaking with a solution to the decompactification problem
We study heterotic ground states in which supersymmetry is broken by coupling the momentum and winding charges of two large extra dimensions to the R-charges of the supersymmetry generators. The large dimensions give rise to towers of heavy string thresholds that contribute to the running of the gau...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2015-10-01
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| Series: | Nuclear Physics B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0550321315002862 |
| _version_ | 1818362558021632000 |
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| author | Alon E. Faraggi Costas Kounnas Hervé Partouche |
| author_facet | Alon E. Faraggi Costas Kounnas Hervé Partouche |
| author_sort | Alon E. Faraggi |
| collection | DOAJ |
| description | We study heterotic ground states in which supersymmetry is broken by coupling the momentum and winding charges of two large extra dimensions to the R-charges of the supersymmetry generators. The large dimensions give rise to towers of heavy string thresholds that contribute to the running of the gauge couplings. In the general case, these contributions are proportional to the volume of the two large dimensions and invalidate the perturbative string expansion. The problem is evaded if the susy breaking sectors arise as a spontaneously broken phase of N=4→N=2→N=0 supersymmetry, provided that N=4 supersymmetry is restored on the boundary of the moduli space. We discuss the mechanism in the case of Z2×Z2 orbifolds, which requires that the twisted sector that contains the large extra dimensions has no fixed points. We analyze the full string partition function and show that the twisted sectors distribute themselves in non-aligned N=2 orbits, hence preserving the solution to the string decompactification problem. Remarkably, we find that the contribution to the vacuum energy from the N=2→N=0 sectors is suppressed, and the only substantial contribution arises from the breaking of the N=4 sector to N=0. |
| first_indexed | 2024-12-13T21:34:29Z |
| format | Article |
| id | doaj.art-7c9f7af3ee83455ea60034acaa35495f |
| institution | Directory Open Access Journal |
| issn | 0550-3213 1873-1562 |
| language | English |
| last_indexed | 2024-12-13T21:34:29Z |
| publishDate | 2015-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Physics B |
| spelling | doaj.art-7c9f7af3ee83455ea60034acaa35495f2022-12-21T23:30:43ZengElsevierNuclear Physics B0550-32131873-15622015-10-01899C32837410.1016/j.nuclphysb.2015.08.001Large volume susy breaking with a solution to the decompactification problemAlon E. Faraggi0Costas Kounnas1Hervé Partouche2Department of Mathematical Sciences, University of Liverpool, Liverpool L69 7ZL, United KingdomLaboratoire de Physique Théorique, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, FranceCentre de Physique Théorique, Ecole Polytechnique, F-91128 Palaiseau Cedex, FranceWe study heterotic ground states in which supersymmetry is broken by coupling the momentum and winding charges of two large extra dimensions to the R-charges of the supersymmetry generators. The large dimensions give rise to towers of heavy string thresholds that contribute to the running of the gauge couplings. In the general case, these contributions are proportional to the volume of the two large dimensions and invalidate the perturbative string expansion. The problem is evaded if the susy breaking sectors arise as a spontaneously broken phase of N=4→N=2→N=0 supersymmetry, provided that N=4 supersymmetry is restored on the boundary of the moduli space. We discuss the mechanism in the case of Z2×Z2 orbifolds, which requires that the twisted sector that contains the large extra dimensions has no fixed points. We analyze the full string partition function and show that the twisted sectors distribute themselves in non-aligned N=2 orbits, hence preserving the solution to the string decompactification problem. Remarkably, we find that the contribution to the vacuum energy from the N=2→N=0 sectors is suppressed, and the only substantial contribution arises from the breaking of the N=4 sector to N=0.http://www.sciencedirect.com/science/article/pii/S0550321315002862 |
| spellingShingle | Alon E. Faraggi Costas Kounnas Hervé Partouche Large volume susy breaking with a solution to the decompactification problem Nuclear Physics B |
| title | Large volume susy breaking with a solution to the decompactification problem |
| title_full | Large volume susy breaking with a solution to the decompactification problem |
| title_fullStr | Large volume susy breaking with a solution to the decompactification problem |
| title_full_unstemmed | Large volume susy breaking with a solution to the decompactification problem |
| title_short | Large volume susy breaking with a solution to the decompactification problem |
| title_sort | large volume susy breaking with a solution to the decompactification problem |
| url | http://www.sciencedirect.com/science/article/pii/S0550321315002862 |
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