It was recently pointed out by E. Witten that for a D-brane to consistently wrap a submanifold of some manifold, the normal bundle must admit a Spin(c) structure. We examine this constraint in the case of type II string compactifications with vanishing cosmological constant, and argue that in all such cases, the normal bundle to a supersymmetric cycle is automatically Spin(c). (C) 1999 Published by Elsevier Science B.V. All rights reserved.
机构:
Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA
Okuda, T
Takayanagi, T
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机构:
Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA
Takayanagi, T
JOURNAL OF HIGH ENERGY PHYSICS,
2006,
(03):
: 4517
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4555