# A solution for tensor reduction of one-loop N-point functions with N >= 6

Fleischer J, Riemann T (2012) *Physics Letters B* 707(3-4): 375-380.

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Fleischer, Jochem

^{UniBi}; Riemann, TordDepartment

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Collisions at the LHC produce many-particle final states, and for precise predictions the one-loop N-point corrections are needed. We study here the tensor reduction for Feynman integrals with N >= 6. A general, recursive solution by Binoth et al. expresses N-point Feynman integrals of rank R in terms of (N - 1)-point Feynman integrals of rank (R - 1) (for N >= 6). We show that the coefficients can be obtained analytically from suitable representations of the metric tensor. Contractions of the tensor integrals with external momenta can be efficiently expressed as well. We consider our approach particularly well suited for automatization. (C) 2011 Published by Elsevier B.V.

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Fleischer J, Riemann T. A solution for tensor reduction of one-loop N-point functions with N >= 6.

*Physics Letters B*. 2012;707(3-4):375-380.Fleischer, J., & Riemann, T. (2012). A solution for tensor reduction of one-loop N-point functions with N >= 6.

*Physics Letters B*,*707*(3-4), 375-380. doi:10.1016/j.physletb.2011.12.060Fleischer, J., and Riemann, T. (2012). A solution for tensor reduction of one-loop N-point functions with N >= 6.

*Physics Letters B*707, 375-380.Fleischer, J., & Riemann, T., 2012. A solution for tensor reduction of one-loop N-point functions with N >= 6.

*Physics Letters B*, 707(3-4), p 375-380. J. Fleischer and T. Riemann, “A solution for tensor reduction of one-loop N-point functions with N >= 6”,

*Physics Letters B*, vol. 707, 2012, pp. 375-380. Fleischer, J., Riemann, T.: A solution for tensor reduction of one-loop N-point functions with N >= 6. Physics Letters B. 707, 375-380 (2012).

Fleischer, Jochem, and Riemann, Tord. “A solution for tensor reduction of one-loop N-point functions with N >= 6”.

*Physics Letters B*707.3-4 (2012): 375-380.
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