On moduli stabilisation and de Sitter vacua in MSSM heterotic orbifolds
2011 (English)In: Journal of High Energy Physics (JHEP), ISSN 1029-8479, E-ISSN 1126-6708, no 1, 071- p.Article in journal (Refereed) Published
We study the problem of moduli stabilisation in explicit heterotic orbifold compactifications, whose spectra contain the MSSM plus some vector-like exotics that can be decoupled. Considering all the bulk moduli, we obtain the 4D low energy effective action for the compactification, which has contributions from various, computable, perturbative and non-perturbative effects. Hidden sector gaugino condensation and string worldsheet instantons result in a combination of racetrack, KKLT-like and cusp-form contributions to the superpotential, which lift all the bulk moduli directions. We point out the properties observed in our concrete models, which tend to be missed when only "generic" features of a model are assumed. We search for interesting vacua and find several de Sitter solutions, but so far, they all turn out to be unstable.
Place, publisher, year, edition, pages
2011. no 1, 071- p.
dS vacua in string theory, Compactification and String Models, Superstrings and Heterotic Strings
IdentifiersURN: urn:nbn:se:uu:diva-157684DOI: 10.1007/JHEP01(2011)071ISI: 000287937900009OAI: oai:DiVA.org:uu-157684DiVA: diva2:436033