The cosmological constant and dark dimensions from non-supersymmetric strings
- 1CPHT, Ecole Polytechnique
- 2University of Liverpool
Abstract
A bstract : We present a string theory construction in which the particle physics contributions to the one-loop vacuum energy exactly cancel, whilst the gravitational contributions are suppressed in the size of one or two large extra dimensions. This provides an ultraviolet realisation of the Dark Dimension and Supersymmetric Large Extra Dimensions scenarios, with, moreover, an explanation as to why the Standard Model contributions to the vacuum energy cancel without the need of eV superpartner mass-splittings. Gravity propagates in micron sized dark dimension(s), whilst the visible and hidden sectors are supported on D-branes. Supersymmetry is broken in the dark dimension(s) à la Scherk-Schwarz, whereas supersymmetry is broken at the string scale, à la Brane Supersymmetry Breaking, in the D-branes sector, without inducing tadpoles, similarly to a different construction proposed a long time ago by Angelantonj and Antoniadis. Vacuum energy from the visible sector is cancelled by the vacuum energy of the hidden sector branes. We also discuss a moduli stabilization scenario inspired by this set-up, finding that the interplay between a Scherk-Schwarz one-loop contribution and non-perturbative effects can fix the size of the dark dimension(s) to be exponentially large in the inverse string-coupling, leading to an exponentially small total vacuum energy, with all moduli stabilised in a dS saddle.
Related
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BibTeX
@article{dudas2026cosmological,
title = {{The cosmological constant and dark dimensions from non-supersymmetric strings}},
author = {Emilian Dudas and Susha Parameswaran and Marco Serra},
journal = {Journal of High Energy Physics},
year = {2026},
month = oct,
doi = {10.1007/jhep10(2026)212},
url = {https://link.springer.com/article/10.1007/JHEP10(2026)212},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - The cosmological constant and dark dimensions from non-supersymmetric strings
AU - Emilian Dudas
AU - Susha Parameswaran
AU - Marco Serra
PY - 2026
DA - 2026/10/21
JO - Journal of High Energy Physics
DO - 10.1007/jhep10(2026)212
UR - https://link.springer.com/article/10.1007/JHEP10(2026)212
AB - A bstract : We present a string theory construction in which the particle physics contributions to the one-loop vacuum energy exactly cancel, whilst the gravitational contributions are suppressed in the size of one or two large extra dimensions. This provides an ultraviolet realisation of the Dark Dimension and Supersymmetric Large Extra Dimensions scenarios, with, moreover, an explanation as to why the Standard Model contributions to the vacuum energy cancel without the need of eV superpartner mass-splittings. Gravity propagates in micron sized dark dimension(s), whilst the visible and hidden sectors are supported on D-branes. Supersymmetry is broken in the dark dimension(s) à la Scherk-Schwarz, whereas supersymmetry is broken at the string scale, à la Brane Supersymmetry Breaking, in the D-branes sector, without inducing tadpoles, similarly to a different construction proposed a long time ago by Angelantonj and Antoniadis. Vacuum energy from the visible sector is cancelled by the vacuum energy of the hidden sector branes. We also discuss a moduli stabilization scenario inspired by this set-up, finding that the interplay between a Scherk-Schwarz one-loop contribution and non-perturbative effects can fix the size of the dark dimension(s) to be exponentially large in the inverse string-coupling, leading to an exponentially small total vacuum energy, with all moduli stabilised in a dS saddle.
SN - 1029-8479
ER -