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hep-th2026★ 1 cited
Strongly Coupled Sectors in Inflation: Gapped Theories of Unparticles
Yikun Jiang, Guilherme L. Pimentel, Chen Yang
We consider a novel scenario for a strongly coupled spectator sector during inflation, that of a higher dimensional conformal field theory with large anomalous dimensions -- ``unpa…
hep-th2026
Strongly Coupled Sectors in Inflation: Gapless Theories and Unparticles
Guilherme L. Pimentel, Chen Yang
We compute correlation functions of the primordial density perturbations when they couple to a gapless, strongly coupled sector of spectator fields -- ``unparticles" -- during infl…
hep-th2025
Bananas are Unparticles: Differential Equations and Cosmological Bootstrap
Tom Westerdijk, Chen Yang
We establish an exact correspondence between tree-level cosmological correlators with unparticle exchange (at integer scaling dimensions) and banana diagrams of conformally coupled…