Journal article 1419 views
Complex factorization and recursion for one-loop amplitudes
,
Warren Perkins
Physical Review D, Volume: 86, Issue: 8, Start page: 085022
Swansea University Authors:
David Dunbar , Warren Perkins
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DOI (Published version): 10.1103/PhysRevD.86.085022
Abstract
We consider the factorisation of one-loop amplitudes at complex kinematic points. By determining the terms that are absent for real kinematics, we can construct a recursive ansatz for the purely rational pieces of one-loop amplitudes in massless theories. We illustrate this method by verifying the B...
| Published in: | Physical Review D |
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| ISSN: | 1550-7998 1550-2368 |
| Published: |
2012
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa13423 |
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| Abstract: |
We consider the factorisation of one-loop amplitudes at complex kinematic points. By determining the terms that are absent for real kinematics, we can construct a recursive ansatz for the purely rational pieces of one-loop amplitudes in massless theories. We illustrate this method by verifying the Bern et.al. n-point ansatze for the single-minus one-loop amplitudes in Yang-Mills theory and by constructing the scalar contribution to the one-loop five graviton MHV scattering amplitude. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
8 |
| Start Page: |
085022 |