A Note on N=2 Superstrings

TL;DR

This paper studies generalized N=2 superstrings in various spacetime signatures, computes four-point functions for tachyon operators, and finds non-vanishing results unlike the standard case, revealing new physical particles with specific properties.

Contribution

It introduces calculations of four-point functions for generalized N=2 superstrings in different signatures, showing non-vanishing results and identifying new physical particles.

Findings

Four-point functions do not vanish in generalized N=2 superstrings.

Exchanged particles are part of the physical spectrum with zero fermion charge.

Results differ from the standard (2,2) signature superstring case.

Abstract

In this note we investigate the generalised critical $N=2$ superstrings in $(1,2p)$ spacetime signature. We calculate the four-point functions for the tachyon operators of these theories. In contrast to the usual $N=2$ superstring in $(2,2)$ spacetime, the four-point functions do not vanish. The exchanged particles of the four-point function are included in the physical spectrum of the corresponding theory and have vanishing fermion charge.