Small $E_8$ Instantons and Tensionless Non-critical Strings

Details Small $E_8$ Instantons and Tensionless Non-critical Strings Small $E_8$ Instantons and Tensionless Non-critical Strings

1996-02-21

arxiv.org/abs/hep-th/9602120v2

Nucl.Phys. B474 (1996) 122-140

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, Latex, two figures added, reference added, We also added a discussion on new phase transitions in six dimensions. Th

Scientific paper

10.1016/0550-3213(96)00243-X

T-duality is used to extract information on an instanton of zero size in the $E_8\times E_8$ heterotic string. We discuss the possibility of the appearance of a tensionless anti-self-dual non-critical string through an implementation of the mechanism suggested by Strominger of two coincident 5-branes. It is argued that when an instanton shrinks to zero size a tensionless non-critical string appears at the core of the instanton. It is further conjectured that appearance of tensionless strings in the spectrum leads to new phase transitions in six dimensions in much the same way as massless particles do in four dimensions.

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