Bossard, Guillaume Kleinschmidt, Axel Pioline, Boris

Unlike the $\mathcal{R}^4$ and $\nabla^4\mathcal{R}^4$ couplings, whose coefficients are Langlands-Eisenstein series of the U-duality group, the coefficient $\mathcal{E}_{(0,1)}^{(d)}$ of the $\nabla^6\mathcal{R}^4$ interaction in the low-energy effective action of type II strings compactified on a torus $T^d$ belongs to a more general class of aut...

Andriot, David Tsimpis, Dimitrios
Published in
Journal of High Energy Physics

We study gravitational waves propagating on a warped Minkowski space-time with D − 4 compact extra dimensions. While Kaluza-Klein scales are typically too high for any current detection, we analyse how the warp factor changes the Kaluza-Klein spectrum of gravitational waves. To that end we provide a complete and explicit expression for the warp fac...

Partouche, Hervé de Vaulchier, Balthazar

When supersymmetry is spontaneously broken at tree level, the spectrum of the heterotic string compactified on orbifolds of tori contains an infinite number of potentially tachyonic modes. We show that this implies instabilities of Minkowski spacetime, when the scale of supersymmetry breaking is of the order of the string scale. We derive the phase...

Cirafici, Michele

BPS spectra give important insights into the non-perturbative regimes of supersymmetric theories. Often from the study of BPS states one can infer properties of the geometrical or algebraic structures underlying such theories. In this paper we approach this problem from the perspective of persistent homology. Persistent homology is at the base of t...

Pioline, Boris
Published in
Journal of High Energy Physics

At low energies, interactions of massless particles in type II strings compactified on a torus Td are described by an effective Wilsonian action S\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}...

Cattaneo, Andrea Fullwood, James

An elliptic fibration admits a birational model referred to as its Weierstrass model, which is in general singular. In the case that the total space of an elliptic fibration is a Calabi--Yau manifold, its Hodge numbers coincide with that of a crepant resolution of its Weierstrass model, which is a hypersurface in a blown up projective bundle which ...

Ketov, Sergey V. Khlopov, Maxim Yu.

We review some recent trends in the inflationary model building, the super-symmetry (SUSY) breaking, the gravitino Dark Matter (DM) and the PrimordialBlack Holes (PBHs) production in supergravity. The Starobinsky inflation can beembedded into supergravity when the inflaton belongs to the massive vectormultiplet associated with a (spontaneously brok...

Coudarchet, Thibaut Partouche, Herve

We analyze quantum no-scale regimes (QNSR) in perturbative heterotic string compactified on tori, with total spontaneous breaking of supersymmetry. We show that for marginal deformations initially at any point in moduli space, the dynamics of a flat, homogeneous and isotropic universe can always be attracted to a QNSR. This happens independently of...

de la Ossa, Xenia Larfors, Magdalena Svanes, Eirik E.
Published in
Communications in Mathematical Physics

Heterotic string compactifications on integrable G2 structure manifolds Y with instanton bundles (V,A),(TY,θ~)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${(V,A), (T...