Multi-instanton and string loop corrections in toroidal orbifold models
| dc.creator | Camara, P. G. | |
| dc.creator | Dudas, E. | |
| dc.date | 2008-06-19 | |
| dc.date | 2008-07-03 | |
| dc.date.accessioned | 2026-07-07T11:51:49Z | |
| dc.date.available | 2026-07-07T11:51:49Z | |
| dc.description | We analyze N=2 (perturbative and non-perturbative) corrections to the effective theory in type I orbifold models where a dual heterotic description is available. These corrections may play an important role in phenomenological scenarios. More precisely, we consider two particular compactifications: the Bianchi-Sagnotti-Gimon-Polchinski orbifold and a freely-acting Z_2 x Z_2 orbifold with N=1 supersymmetry and gauge group SO(q) x SO(32-q). By exploiting perturbative calculations of the physical gauge couplings on the heterotic side, we obtain multi-instanton and one-loop string corrections to the Kähler potential and the gauge kinetic function for these models. The non-perturbative corrections appear as sums over relevant Hecke operators, whereas the one-loop correction to the Kähler potential matches the expression proposed in [1,2]. We argue that these corrections are universal in a given class of models where target-space modular invariance (or a subgroup of it) holds. | |
| dc.description | 37 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/0806.3102 | |
| dc.identifier | http://arxiv.org/abs/0806.3102 | |
| dc.identifier | JHEP0808:069,2008 | |
| dc.identifier | doi:10.1088/1126-6708/2008/08/069 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/204022 | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Multi-instanton and string loop corrections in toroidal orbifold models | |
| dc.type | text |