3 papers
gr-qc2026
Nonlinear Stability of Kerr-Sen Black Holes in Merging Binaries
Andrew Carroll, Eric W. Hirschmann, Hyun Lim +3
We investigate the stability of Kerr-Sen black holes, which arise in Einstein-Maxwell-dilaton-axion theory. Within a numerical relativity framework, we perform head-on binary black…
hep-th2026
A Supernova Constraint on F-theory
Sebastian Vander Ploeg Fallon, James Halverson, Liam McAllister +1
We study constraints on the quantum chromodynamics (QCD) axion in F-theory, a strongly coupled limit of string theory. We build models of QCD from compactifications to four dimensi…
hep-th2025
F-theory Axiverse
Sebastian Vander Ploeg Fallon, James Halverson, Liam McAllister +1
We compute the couplings of Ramond-Ramond four-form axions in three ensembles of F-theory compactifications, with up to 181,200 axions. We work in the stretched Kähler cone, where…