Five-brane instantons and R{sup 2} couplings in N=4 string theory
- Enrico Fermi Institute, University of Chicago, 5640 Ellis Avenue, Chicago, Illinois 60637 (United States)
- Department of Physics, Yale University, New Haven, Connecticut 06511 (United States)
We compute the gravitational coupling F{sub 1} for type IIA string theory on K3{times}T{sup 2} and use string-string duality to deduce the corresponding term for heterotic string on T{sup 6}. The latter is an infinite sum of gravitational instanton effects which we associate with the effects of Euclidean five-branes wrapped on T{sup 6}. These five-branes are the neutral five-branes or zero-size instantons of heterotic string theory. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 568384
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 4 Vol. 57; ISSN 0556-2821; ISSN PRVDAQ
- Country of Publication:
- United States
- Language:
- English
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