Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1996-11-06
Phys.Lett. B396 (1997) 122-132
Physics
High Energy Physics
High Energy Physics - Theory
13 pages, LaTeX file, minor mistakes and misprints corrected
Scientific paper
10.1016/S0370-2693(97)00133-0
We present a new integrable extension of the a=-2, N=2 SKdV hierarchy, with the "small" N=4 superconformal algebra (SCA) as the second hamiltonian structure. As distinct from the previously known N=4 supersymmetric KdV hierarchy associated with the same N=4 SCA, the new system respects only N=2 rigid supersymmetry. We give for it both matrix and scalar Lax formulations and consider its various integrable reductions which complete the list of known SKdV systems with the N=2 SCA as the second hamiltonian structure. We construct a generalized Miura transformation which relates our system to the $\alpha = -2$, N=2 super Boussinesq hierarchy and, respectively, the ``small'' N=4 SCA to the N=2 W_3 superalgebra.
Delduc Francois
Gallot Laurent
Ivanov Evgeny
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