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22 papers · 2 filters
Fourier expansions of Kac-Moody Eisenstein series and degenerate Whittaker vectors
Philipp Fleig, Axel Kleinschmidt, Daniel Persson
Motivated by string theory scattering amplitudes that are invariant under a discrete U-duality, we study Fourier coefficients of Eisenstein series on Kac-Moody groups. In particula…
Second Quantized Mathieu Moonshine
Daniel Persson, Roberto Volpato
We study the second quantized version of the twisted twining genera of generalized Mathieu moonshine, and prove that they give rise to Siegel modular forms with infinite product re…
Generalized phase transitions in Lovelock gravity
Xian O. Camanho, Jose D. Edelstein, Gaston Giribet +1
We investigate a novel mechanism for phase transitions that is a distinctive feature of higher-curvature gravity theories. For definiteness, we bound ourselves to the case of Lovel…
Ekpyrotic Perturbations With Small Non-Gaussian Corrections
Angelika Fertig, Jean-Luc Lehners, Enno Mallwitz
The entropic mechanism for producing nearly scale-invariant density perturbations in a contracting ekpyrotic universe relies on having an unstable scalar potential. Here we develop…
One-loop renormalization in a toy model of Horava-Lifshitz gravity
Dario Benedetti, Filippo Guarnieri
We present a one loop calculation in the context of Horava-Lifshitz gravity. Due to the complexity of the calculation in the full theory we focus here on the study of a toy model,…
Cubic-interaction-induced deformations of higher-spin symmetries
Euihun Joung, Massimo Taronna
The deformations of higher-spin symmetries induced by cubic interactions of symmetric massless bosonic fields are analyzed within the metric-like formalism. Our analysis amends the…