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math.QA2026
Chiral Extensions of Cotangent Yangian
Keyou Zeng
We construct chiral extensions of the cotangent Yangian using vertex algebroids. At zero level, the construction yields a vertex algebra with a compatible coproduct, whose Zhu redu…
hep-th2026
Factorization Algebras and Quantum Groups from Generalized Poisson Sigma Models
Keyou Zeng
In this work we introduce and study a family of holomorphic--topological field theories, which we call generalized Poisson sigma models. These theories are higher-dimensional analo…