期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.081602
关键词
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资金
- German Science Foundation (DFG) within the Collaborative Research Center 676 Particles, Strings and the Early Universe
- Perimeter Institute for Theoretical Physics
On-shell superspace techniques are used to quantify R-symmetry violation in type IIB superstring theory amplitudes in a flat background in 10 dimensions. This shows the existence of a particularly simple class of nonvanishing amplitudes in this theory, which violate R symmetry maximally. General properties of the class and some of its extensions are established that at string tree level are shown to determine the first three nontrivial effective field theory contributions to all multiplicity. This leads to a natural conjecture for the exact analytic part of the first two of these.
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