Anomalies, D-flatness and small instantons

R. G. Leigh

doi:10.1016/0370-2693(96)00342-5

Anomalies, D-flatness and small instantons

R. G. Leigh

Research output: Contribution to journal › Article › peer-review

Abstract

Recently, Witten has proposed a mechanism for symmetry enhancement in SO(32) heterotic string theory, where the singularity obtained by shrinking an instanton to zero size is resolved by the appearance of an Sp(1) gauge symmetry. In this short letter, we consider spacetime constraints from anomaly cancellation in six dimensions and D-flatness and demonstrate a subtlety which arises in the moduli space when many instantons are shrunk to zero size.

Original language	English (US)
Pages (from-to)	97-100
Number of pages	4
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	378
Issue number	1-4
DOIs	https://doi.org/10.1016/0370-2693(96)00342-5
State	Published - Jun 20 1996
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/0370-2693(96)00342-5

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abstract = "Recently, Witten has proposed a mechanism for symmetry enhancement in SO(32) heterotic string theory, where the singularity obtained by shrinking an instanton to zero size is resolved by the appearance of an Sp(1) gauge symmetry. In this short letter, we consider spacetime constraints from anomaly cancellation in six dimensions and D-flatness and demonstrate a subtlety which arises in the moduli space when many instantons are shrunk to zero size.",

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note = "I wish to thank S. Chaudhuri for many useful conversationsa nd inspiration, and J.H. Schwarz for conversationsr egardingsome of the results presented early in section 1. I also thank many members of the Rutgers string group for ongoing collaboration and E. Witten for comments. Research supported in part by the U.S. Department of Energy, contract DE-FG05-90ER40599.",

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N2 - Recently, Witten has proposed a mechanism for symmetry enhancement in SO(32) heterotic string theory, where the singularity obtained by shrinking an instanton to zero size is resolved by the appearance of an Sp(1) gauge symmetry. In this short letter, we consider spacetime constraints from anomaly cancellation in six dimensions and D-flatness and demonstrate a subtlety which arises in the moduli space when many instantons are shrunk to zero size.

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Anomalies, D-flatness and small instantons

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