$W_n^{(\ka)}$ algebra associated with the Moyal KdV Hierarchy

Details $W_n^{(\ka)}$ algebra associated with the Moyal KdV Hierarchy $W_n^{(\ka)}$ algebra associated with the Moyal KdV Hierarchy

2001-03-12

arxiv.org/abs/hep-th/0103083v2

Phys.Lett. B508 (2001) 173-183

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, Revtex, v.2: typos corrected and references added

Scientific paper

10.1016/S0370-2693(01)00489-0

We consider the Gelfand-Dickey (GD) structure defined by the Moyal $\star$-product with parameter $\ka$, which not only defines the bi-Hamiltonian structure for the generalized Moyal KdV hierarchy but also provides a $W_n^{(\ka)}$ algebra containing the Virasoro algebra as a subalgebra with central charge $\ka^2(n^3-n)/3$. The free-field realization of the $W_n^{(\ka)}$ algebra is given through the Miura transformation and the cases for $W_3^{(\ka)}$ and $W_4^{(\ka)}$ are worked out in detail.

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