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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Acceso en línea: | https://arxiv.org/abs/2404.18995 |
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| author | Antoniadis, Ignatios Guillen, Anthony Lacombe, Osmin |
| author_facet | Antoniadis, Ignatios Guillen, Anthony Lacombe, Osmin |
| contents | We perform a detailed study of (supersymmetric) moduli stabilisation in type IIB toroidal orientifolds with fluxes. We provide strong evidence towards exhaustion of the finite number of inequivalent vacua for a given total 3-form flux charge $N_{\rm flux}$. We also find that the minimal value of the string coupling $g_s$ is given in terms of $N_{\rm flux}$ and present strong evidence for the asymptotic relation $g_{s,\,\rm{min}}\sim c/N_{\rm flux}^α$, with $α=1,2$, valid for not too small $N_{\rm flux}$, where $c$ is an order 1 coefficient and $α$ depends on the orbifold. Imposing tadpole cancellation, $N_{\rm flux}$ is bounded from the number of orientifold O3-planes. Combined with the flux quantisation, this forbids orientifold vacua without anti-brane charge. On the other hand, the presence of negative D3-brane charge induced by magnetised D7-branes breaks supersymmetry and relaxes the bound, allowing significantly smaller values for $g_s$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_18995 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Flux vacua in type IIB compactifications on orbifolds: their finiteness and minimal string coupling Antoniadis, Ignatios Guillen, Anthony Lacombe, Osmin High Energy Physics - Theory We perform a detailed study of (supersymmetric) moduli stabilisation in type IIB toroidal orientifolds with fluxes. We provide strong evidence towards exhaustion of the finite number of inequivalent vacua for a given total 3-form flux charge $N_{\rm flux}$. We also find that the minimal value of the string coupling $g_s$ is given in terms of $N_{\rm flux}$ and present strong evidence for the asymptotic relation $g_{s,\,\rm{min}}\sim c/N_{\rm flux}^α$, with $α=1,2$, valid for not too small $N_{\rm flux}$, where $c$ is an order 1 coefficient and $α$ depends on the orbifold. Imposing tadpole cancellation, $N_{\rm flux}$ is bounded from the number of orientifold O3-planes. Combined with the flux quantisation, this forbids orientifold vacua without anti-brane charge. On the other hand, the presence of negative D3-brane charge induced by magnetised D7-branes breaks supersymmetry and relaxes the bound, allowing significantly smaller values for $g_s$. |
| title | Flux vacua in type IIB compactifications on orbifolds: their finiteness and minimal string coupling |
| topic | High Energy Physics - Theory |
| url | https://arxiv.org/abs/2404.18995 |