String-induced Yang-Mills coupling to self-dual gravity

Details String-induced Yang-Mills coupling to self-dual gravity String-induced Yang-Mills coupling to self-dual gravity

1998-08-10

arxiv.org/abs/hep-th/9808053v1

Nucl.Phys. B539 (1999) 309-328

Physics

High Energy Physics

High Energy Physics - Theory

20 pages, no figures

Scientific paper

10.1016/S0550-3213(98)00732-9

By considering N=2 string amplitudes we determine the (2+2)-dimensional target space action for the physical degrees of freedom: self-dual gravity and self-dual Yang-Mills, together with their respective infinite towers of higher-spin inequivalent picture states. Novel `stringy' couplings amongst these fields are essential ingredients of an action principle for the effective target space field theory. We discuss the covariant description of this theory in terms of self-dual fields on a hyperspace parametrised by the target space coordinate and a commuting chiral spinor.

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