%0 Journal Article
%T The Zero Tension Limit of Strings and Superstrings
%A Ulf Lindstr£żm
%J Physics
%D 1993
%I arXiv
%X The string equivalent of a massless particle ($m=0$) is the tensionless string ($T=0$). The study of such strings is of interest when trying to understand the high energy limit of ordinary strings. I discuss the classical $T\to 0$ limit of the bosonic string, the spinning string and the superstring. A common feature is the appearence of a space-time (super-)conformal symmetry replacing the world-sheet Weyl invariance. The question of whether this symmetry may survive quantization is addressed. A lightcone analysis of the quantized bosonic tensionless string leads to severe constraints on the physical states: they are space-time diffeomorphism singlets characterized by their topological properties only.
%U http://arxiv.org/abs/hep-th/9303173v1