Point-like instantons and the Spin(32)/ℤ2 heterotic string

Journal Article (Journal Article)

We consider heterotic string theories compactified on a K3 surface which lead to an unbroken perturbative gauge group of Spin(32)/ℤ2. All solutions obtained are combinations of two types of point-like instanton - one "simple type" as discovered by Witten and a new type associated to the "generalized second Stiefel-Whitney class" as introduced by Berkooz et al. The new type of instanton is associated to an enhancement of the gauge symmetry by Sp(4) and the addition of a massless tensor supermultiplet. It is shown that if four simple instantons coalesce at an orbifold point in the K3 surface then a massless tensor field appears which may be used to interpolate between the two types of instanton. By allowing various combinations of point-like instantons to coalesce, large gauge groups (e.g., rank 128) with many massless tensor supermultiplets result. The analysis is done in terms of F-theory. © 1997 Elsevier Science B.V.

Full Text

Duke Authors

Cited Authors

  • Aspinwall, PS

Published Date

  • July 7, 1997

Published In

Volume / Issue

  • 496 / 1-2

Start / End Page

  • 149 - 176

International Standard Serial Number (ISSN)

  • 0550-3213

Digital Object Identifier (DOI)

  • 10.1016/S0550-3213(97)00232-0

Citation Source

  • Scopus