Speaker
Reimar Hecht
(ETH Zurich)
Description
Beisert's S-matrix was fixed by centrally extended sl(2|2) symmetry. Here we examine q-deformed centrally extended sl(2|2) and its sl(2) automorphisms for which we obtain the Hopf structure and the universal R-matrix. In addition, we consider this algebra as a contraction limit of the exceptional Lie superalgebra d(2,1,\alpha). This is closely related to 3D kappa-Poincaré for which we find a new free parameter of the Hopf algebra.
Primary author
Reimar Hecht
(ETH Zurich)
