On universal Baxter operator for classical groups

The universal Baxter operator is an element of the Archimedean spherical Hecke algebra H(G,K), K be a maximal compact subgroup of a Lie group G. It has a defining property to act in spherical principle series representations of G via multiplication on the corresponding local Archimedean L-factors. Recently such operators were introduced for G=GL_{\ell+1}(R) as generalizations of the Baxter operators arising in the theory of quantum Toda chains. In this note we provide universal Baxter operators for classical groups SO_{2\ell}, Sp_{2\ell} using the results of Piatetski-Shapiro and Rallis on integral representations of local Archimedean L-factors.

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