Calculating contracted tensor Feynman integrals

Fleischer J, Riemann T (2011)
Physics Letters B 701(5): 646-653.

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A recently derived approach to the tensor reduction of 5-point one-loop Feynman integrals expresses the tensor coefficients by scalar 1-point to 4-point Feynman integrals completely algebraically. In this Letter we derive extremely compact algebraic expressions for the contractions of the tensor integrals with external momenta. This is based on sums over signed minors weighted with scalar products of the external momenta. With these contractions one can construct the invariant amplitudes of the matrix elements under consideration, and the evaluation of one-loop contributions to massless and massive multi-particle production at high energy colliders like LHC and ILC is expected to be performed very efficiently. (C) 2011 Elsevier B.V. All rights reserved.
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Fleischer J, Riemann T. Calculating contracted tensor Feynman integrals. Physics Letters B. 2011;701(5):646-653.
Fleischer, J., & Riemann, T. (2011). Calculating contracted tensor Feynman integrals. Physics Letters B, 701(5), 646-653.
Fleischer, J., and Riemann, T. (2011). Calculating contracted tensor Feynman integrals. Physics Letters B 701, 646-653.
Fleischer, J., & Riemann, T., 2011. Calculating contracted tensor Feynman integrals. Physics Letters B, 701(5), p 646-653.
J. Fleischer and T. Riemann, “Calculating contracted tensor Feynman integrals”, Physics Letters B, vol. 701, 2011, pp. 646-653.
Fleischer, J., Riemann, T.: Calculating contracted tensor Feynman integrals. Physics Letters B. 701, 646-653 (2011).
Fleischer, Jochem, and Riemann, Tord. “Calculating contracted tensor Feynman integrals”. Physics Letters B 701.5 (2011): 646-653.
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