An Automated Implementation of On-shell Methods for One-Loop Amplitudes

@article{Berger2008AnAI,
  title={An Automated Implementation of On-shell Methods for One-Loop Amplitudes},
  author={C. F. Berger and Z. Bern and L. J. Dixon and F. F. Cordero and D. Forde and H. Ita and D. Kosower and D. Ma{\^i}tre},
  journal={Physical Review D},
  year={2008},
  volume={78},
  pages={036003}
}
  • C. F. Berger, Z. Bern, +5 authors D. Maître
  • Published 2008
  • Physics
  • Physical Review D
  • We present the first results from BlackHat, an automated C++ program for calculating one-loop amplitudes. The program implements the unitarity method and on-shell recursion to construct amplitudes. As input to the calculation, it uses compact analytic formulae for tree amplitudes for four-dimensional helicity states. The program performs all related computations numerically. We make use of recently developed on-shell methods for evaluating coefficients of loop integrals, introducing a discrete… CONTINUE READING
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