Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-06-05
Nucl.Phys.B787:176-197,2007
Physics
High Energy Physics
High Energy Physics - Theory
22 pages, Latex, minor corrections, to appear in Nucl. Phys. B
Scientific paper
10.1016/j.nuclphysb.2007.07.015
Elaborating on previous work (hep-th/0605211, hep-th/0611247), we show how the linear and nonlinear chiral multiplets of N=4 supersymmetric mechanics with the off-shell content (2,4,2) can be obtained by gauging three distinct two-parameter isometries of the ``root'' (4,4,0) multiplet actions. In particular, two different gauge groups, one abelian and one non-abelian, lead, albeit in a disguised form in the second case, to the same (unique) nonlinear chiral multiplet. This provides an evidence that no other nonlinear chiral N=4 multiplets exist. General sigma model type actions are discussed, together with the restricted potential terms coming from the Fayet-Iliopoulos terms associated with abelian gauge superfields. As in our previous work, we use the manifestly supersymmetric language of N=4, d=1 harmonic superspace. A novel point is the necessity to use in parallel the \lambda and \tau gauge frames, with the ``bridges'' between these two frames playing a crucial role. It is the N=4 harmonic analyticity which, though being non-manifest in the \tau frame, gives rise to both linear and nonlinear chirality constraints.
Delduc Francois
Ivanov Evgeny
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