Comultiplication for shifted Yangians and quantum open Toda lattice
  We study a coproduct in type A quantum open Toda lattice in terms of a coproduct in the shifted Yangian of sl_2. At the classical level this corresponds to the multiplication of scattering matrices of euclidean SU(2) monopoles. We also study coproducts for shifted Yangians for any simply-laced Lie algebra. 
Michael Finkelberg, Joel Kamnitzer, Khoa Pham, Leonid Rybnikov, Alex   Weekes
math.RT math.AG math.QA