Ward identities and the vanishing theorem for loop amplitudes of the closed N=2 string

Details Ward identities and the vanishing theorem for loop amplitudes of the closed N=2 string Ward identities and the vanishing theorem for loop amplitudes of the closed N=2 string

1999-12-02

arxiv.org/abs/hep-th/9912016v1

Phys.Lett. B474 (2000) 58-66

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, 2 figures

Scientific paper

10.1016/S0370-2693(00)00014-9

The existence of a ground ring of ghost number zero operators in the chiral
BRST cohomology of the N=2 string is used to derive an infinite set of Ward
identities for the closed-string scattering amplitudes at arbitrary genus.
These identities are sufficient to rederive the well known vanishing theorem
for loop amplitudes with more than three external legs.

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