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On integrands and loop momentum in string and field theory
The notion of a unique integrand does not a priori makes sense in field theory: different Feynman diagrams have different loop momenta and there should be no reason to compare them. In string theory, however, a global integrand is natural and allows one, for instance, to make explicit the separation...
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| Lenguaje: | eng |
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2019
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| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.102.026006 http://cds.cern.ch/record/2654762 |