3 papers
hep-ph2026
The decay rate of metastable cosmic strings beyond the thin-string approximation
Valerie Domcke, Yu Hamada
In the context of grand unified theories, any cosmic strings present in the post-inflationary universe are likely to be metastable, with a decay rate set by the spontaneous creatio…
hep-th2026
A Casimir obstruction to asymptotically flat black-brane completions of non-supersymmetric 7-branes
Yuta Hamada, Hayate Kimura
We study axisymmetric 7-brane solutions in the dilaton-gravity sector of 10d supergravity, including the backreaction of the Casimir energy induced by monodromies around the transv…
hep-th2026
Black String in the Standard Model
Yu Hamada, Yuta Hamada, Hayate Kimura
The Swampland cobordism conjecture predicts various new objects in a theory with dynamical gravity. Applying this idea to the Standard Model of particle physics, a string object is…