Solving for tadpole coefficients in one-loop amplitudes
arXiv:0904.2766 · doi:10.1016/j.physletb.2009.10.038
Abstract
One-loop amplitudes may be expanded in a basis of scalar integrals multiplied by rational coefficients. We relate the coefficient of the one-point integral to the coefficients of higher-point integrals, by considering the effects of introducing an additional, unphysical propagator, subject to certain conditions.
9 pages. v2: Eq. (28) corrected, typos fixed, minor improvements
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Cited by in corpus (19)
- On the Integrand-Reduction Method for Two-Loop Scattering Amplitudes
- Decomposition of Feynman Integrals by Multivariate Intersection Numbers
- Loop amplitudes in gauge theories: modern analytic approaches
- Double-Cut of Scattering Amplitudes and Stokes' Theorem
- One-Loop Helicity Amplitudes for ttbar Production at Hadron Colliders
- Multi-Parton Scattering Amplitudes via On-Shell Methods
- Single Cut Integration
- BCJ Identities and -Dimensional Generalized Unitarity
- External leg corrections in the unitarity method
- Analytic Tadpole Coefficients of One-loop Integrals
- Reduction of General One-loop Integrals Using Auxiliary Vector
- Reduction of one-loop integrals with higher poles by unitarity cut method
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- Massive particles and unitarity cuts
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