3 papers
hep-th2026
The warp factor of supersymmetric near-horizon geometries: single-point rigidity, the perfect square, and global constraints
Usman Kayani
On a compact connected section of a supersymmetric -horizon the Killing-spinor bilinears give a pointwise identity relating the warp factor , the rotation one-form…
hep-th2026
A second rotational Killing field on gauged vector-multiplet horizons, and a no-go for varying-moduli black rings
Usman Kayani
We study supersymmetric near-horizon geometries of gauged supergravity coupled to vector multiplets, on the branch where the canonical rotational Killing vector of…
hep-th2019
Dynamical supersymmetry enhancement of black hole horizons
Usman Kayani
This thesis is devoted to the study of dynamical symmetry enhancement of black hole horizons in string theory. In particular, we consider supersymmetric horizons in the low energy…