Tree Amplitudes in Noncritical $N=2$ Strings

TL;DR

This paper examines tree amplitudes in noncritical N=2 strings, highlighting differences from the critical case and suggesting a discontinuity in the transition between models with different central charges.

Contribution

It provides new calculations of tree amplitudes in noncritical N=2 strings and discusses the discontinuity when transitioning from subcritical to critical models.

Findings

Tree amplitudes are computed for noncritical N=2 strings.

A discontinuity is indicated when passing from the $$ model to the critical case.

Differences between Coulomb gas representation and critical models are analyzed.

Abstract

Recent results for tree amplitudes for the $N=2$ noncritical strings are presented and compared with the critical case. Arguments are given which indicate a certain discontinuity in passing from the $\hat c < 1$ model (in a Coulomb gas representation) to the $\hat c = 1$ critical case.