Cutkosky Rules from Outer Space
Jul 17, 20168 pages
Published in:
- PoS LL2016 (2016) 035
Contribution to:
- , 035
- LL2016
- Published: Sep 5, 2016 by SISSA
e-Print:
- 1607.04861 [hep-th]
DOI:
Report number:
- MAPHY-AVH-2016-16
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Abstract: (PoS)
We overview recent results on the mathematical foundations of Cutkosky rules. We emphasize that the two operations of shrinking an internal edge or putt ing internal lines on the mass-shell are natural operation on the cubical chain complex studied in th e context of geometric group theory. This together with Cutkosky’s theorem regarded as a theorem which informs us about variations connected to the monodromy of Feynman amplitudes allows for a systematic approach to normal and anomalous thresholds, dispersion relations and the opt ical theorem. In this report we follow [1] closely.Note:
- 8p, talk given at Loops and Legs in Quantum Field Theory, Leipzig, April 24-29 2016, Germany
- group theory: geometrical
- dispersion relation
- optical theorem
- monodromy
- Feynman
References(3)
Figures(0)
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- [2]
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