The Momentum Kernel of Gauge and Gravity Theories

Details The Momentum Kernel of Gauge and Gravity Theories The Momentum Kernel of Gauge and Gravity Theories

2010-10-19

arxiv.org/abs/1010.3933v1

JHEP 1101:001,2011

Physics

High Energy Physics

High Energy Physics - Theory

19 pages, 1 figure

Scientific paper

10.1007/JHEP01(2011)001

We derive an explicit formula for factorizing an $n$-point closed string amplitude into open string amplitudes. Our results are phrased in terms of a momentum kernel which in the limit of infinite string tension reduces to the corresponding field theory kernel. The same momentum kernel encodes the monodromy relations which lead to the minimal basis of color-ordered amplitudes in Yang-Mills theory. There are interesting consequences of the momentum kernel pertaining to soft limits of amplitudes. We also comment on surprising links between gravity and certain combinations of kinematic and color factors in gauge theory.

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