The Zero Tension Limit of Strings and Superstrings

Details The Zero Tension Limit of Strings and Superstrings The Zero Tension Limit of Strings and Superstrings

1993-03-31

arxiv.org/abs/hep-th/9303173v1

Physics

High Energy Physics

High Energy Physics - Theory

Invited lecture at the INFN ELOISATRON WORKSHOP "From Superstrings To Supergravity", 7 pages Latex, University of Stockholm pr

Scientific paper

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.

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