The Interacting $W_3$ String

Details The Interacting $W_3$ String The Interacting $W_3$ String

1992-12-18

arxiv.org/abs/hep-th/9212117v2

Nucl.Phys.B403:351-376,1993

Physics

High Energy Physics

High Energy Physics - Theory

(Revised version), 26 pages, Plain Tex, CTP TAMU-86/92, KUL-TF-92/43

Scientific paper

10.1016/0550-3213(93)90040-V

We present a procedure for computing gauge-invariant scattering amplitudes in the $W_3$ string, and use it to calculate three-point and four-point functions. We show that non-vanishing scattering amplitudes necessarily involve external physical states with excitations of ghosts as well as matter fields. The crossing properties of the four-point functions are studied, and it is shown that the duality of the Virasoro string amplitudes generalises in the $W_3$ string, with different sets of intermediate states being exchanged in different channels. We also exhibit a relation between the scattering amplitudes of the $W_3$ string and the fusion rules of the Ising model.

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