The affine infinite-product factorization conjecture for universal K-matrices

Let $\Upsilon$ be the universal K-matrix associated with an affine quantum symmetric pair, and let the quasi-$R$-matrix be the corresponding universal quasi-$R$-matrix of a quantum affine algebra or Yangian. An infinite-product factorization is a factorization of $\Upsilon$ as an infinite ordered product of factors analogous to the corresponding factorization of the quasi-$R$-matrix.

Affine factorization conjecture. In affine type, $\Upsilon$ admits an infinite-product factorization analogous to such a factorization of the quasi-$R$-matrix of quantum affine algebras and Yangians.

The conjecture is motivated by the absence of explicit universal K-matrix formulae in the affine case and by the abelian behavior in restricted rank one. The source does not state that this factorization has been proved.