Abstract
Quantum hamiltonian reduction for co-adjoint orbits of affine algebras is considered. We investigate in detail new quantum hamiltonian reductions of sl(3) current algebras which yield twisted versions of W 3 (2). We discuss all possible quantum reductions of sl(3) current algebras in which twisting terms from the Sugawara tensor are specific by vectors on the weight lattice of sl(3). Some comments are also given on sl( n) ( n⩾4) cases reduced in a similar way.
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