World-Sheet String Duality and the Hidden Supersymmetry
Tamiaki Yoneya
TL;DR
This paper reviews how world-sheet string dualities facilitate the realization of 10D N=2 supersymmetry in open superstring theory without GSO projection, and explores potential mechanisms for supersymmetry restoration.
Contribution
It demonstrates the crucial role of world-sheet dualities in realizing supersymmetry without GSO projection and discusses possible supersymmetry restoration mechanisms.
Findings
World-sheet dualities are key to 10D N=2 supersymmetry realization.
Supersymmetry can be realized nonlinearly without GSO projection.
Speculation on mechanisms for supersymmetry restoration from world-sheet dynamics.
Abstract
It is reviewed how space-time supersymmetry is realized nonlinearly in open superstring theory without making the GSO projection. We show that the world-sheet string dualities, viz. dualities of open-closed strings and of open-open strings, play crucial roles for the existence of 10 dimensional N=2 supersymmetry in a spontaneously broken phase. We also speculate on a possible mechanism of the restoration of supersymmetry from the viewpoint of world-sheet dynamics.
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