TY  - EJOUR
AU  - Leedom, Jacob Michael
AU  - Righi, Nicole
AU  - Westphal, Alexander
TI  - Heterotic de Sitter Beyond Modular Symmetry
IS  - DESY-22-173
M1  - PUBDB-2022-06518
M1  - DESY-22-173
M1  - arXiv:2212.03876
M1  - KCL-PH-TH/2022-54
PY  - 2022
N1  - 57 pages, 8 figures
AB  - We study the vacua of 4d heterotic toroidal orbifolds using effective theories consisting of an overall Kahler modulus, the dilaton, and non-perturbative corrections to both the superpotential and Kahler potential that respect modular invariance. We prove two de Sitter no-go theorems for several classes of vacua and thereby substantiate previous conjectures. Additionally, we provide evidence that extrema of the scalar potential can occur inside the SL(2,\mathbbZ) fundamental domain of the Kahler modulus, in contradiction of a separate conjecture. We also illustrate a loophole in the no-go theorems and determine criteria that allow for metastable de Sitter vacua. Finally, we identify inherently stringy non-perturbative effects in the dilaton sector that could exploit this loophole and potentially realize de Sitter vacua.
LB  - PUB:(DE-HGF)25
DO  - DOI:10.3204/PUBDB-2022-06518
UR  - https://bib-pubdb1.desy.de/record/484838
ER  -