Drinfeld realization for quantum affine orthosymplectic superalgebras

A well-defined braid groupoid action is an essential tool for constructing the new Drinfeld realization of a quantum affine superalgebra. For quantum affine orthosymplectic superalgebras (types [Formula: see text], [Formula: see text], and [Formula: see text]), this action was not fully defined, as the braid operators [Formula: see text] were known only up to normalization factors. In this paper, we solve this problem by providing the explicit formulas for these operators for any choice of parity. This yields a well-defined braid group action on the direct sum of these superalgebras. As a consequence, we use this action to formally introduce the new Drinfeld realization [Formula: see text] for these types and prove that the corresponding Drinfeld–Jimbo quantum group [Formula: see text] is its surjective homomorphic image. We conjecture that this map is an isomorphism.