N=4 supersymmetry breaking in type IIA superstrings
- Theoretical Physics Institute, University of Alberta, Edmonton, Alberta, T6G 2J1 (CANADA)
We construct the two parameter K3 surface and show that there is a point in its moduli space where cycles vanish which do not lead to an enhancement of symmetry in a type IIA superstring. At this point we also find two soliton states which are massless. We then consider a type IIA superstring compactified on K3{times}T{sup 2}. For this theory, the massless solitons belong to an N=2 hypermultiplet because there is no enhancement of gauge symmetry. Thus, the N=4 supersymmetry found when the soliton states are massive, breaks down to N=2 supersymmetry when the soliton states are massless. The renormalization of the gauge couplings confirm this result. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 471238
- Journal Information:
- Physical Review, D, Vol. 55, Issue 2; Other Information: PBD: Jan 1997
- Country of Publication:
- United States
- Language:
- English
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