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Worldline theories with towers of internal states (2020)
Journal Article
Abel, S., & Lewis, D. (2020). Worldline theories with towers of internal states. Journal of High Energy Physics, 2020(12), Article 69. https://doi.org/10.1007/jhep12%282020%29069

We study particle theories that have a tower of worldline internal degrees of freedom. Such a theory can arise when the worldsheet of closed strings is dimensionally reduced to a worldline, in which case the tower is infinite with regularly spaced ma... Read More about Worldline theories with towers of internal states.

A systematic approach to Kähler moduli stabilisation (2020)
Journal Article
AbdusSalam, S., Abel, S., Cicoli, M., Quevedo, F., & Shukla, P. (2020). A systematic approach to Kähler moduli stabilisation. Journal of High Energy Physics, 2020(8), Article 047. https://doi.org/10.1007/jhep08%282020%29047

Achieving full moduli stabilisation in type IIB string compactifications for generic Calabi-Yau threefolds with hundreds of Kähler moduli is notoriously hard. This is due not just to the very fast increase of the computational complexity with the num... Read More about A systematic approach to Kähler moduli stabilisation.

On the stability of open-string orbifold models with broken supersymmetry (2020)
Journal Article
Abel, S., Coudarchet, T., & Partouche, H. (2020). On the stability of open-string orbifold models with broken supersymmetry. Nuclear Physics B, 957, Article 115100. https://doi.org/10.1016/j.nuclphysb.2020.115100

We consider an open-string realisation of spontaneous breaking of supersymmetry in four-dimensional Minkowski spacetime. It is based on type IIB orientifold theory compactified on , with Scherk–Schwarz supersymmetry breaking implemented along . We sh... Read More about On the stability of open-string orbifold models with broken supersymmetry.

Nonlocal gravity with worldline inversion symmetry (2020)
Journal Article
Abel, S., Buoninfante, L., & Mazumdar, A. (2020). Nonlocal gravity with worldline inversion symmetry. Journal of High Energy Physics, 2020(1), Article 3. https://doi.org/10.1007/jhep01%282020%29003

We construct a quadratic curvature theory of gravity whose graviton propagator around the Minkowski background respects wordline inversion symmetry, the particle approximation to modular invariance in string theory. This symmetry automatically yields... Read More about Nonlocal gravity with worldline inversion symmetry.