Scattering Amplitudes with Open Loops

Nov, 2011
4 pages
Published in:
  • Phys.Rev.Lett. 108 (2012) 111601
e-Print:
Report number:
  • ZU-TH-23-11,
  • LPN11-66
Experiments:

Citations per year

20112015201920232025050100150
Abstract: (arXiv)
We introduce a new technique to generate scattering amplitudes at one loop. Traditional tree algorithms, which handle diagrams with fixed momenta, are promoted to generators of loop-momentum polynomials that we call open loops. Combining open loops with tensor-integral and OPP reduction results in a fully flexible, very fast, and numerically stable one-loop generator. As demonstrated with non-trivial applications, the open-loop approach will permit to obtain precise predictions for a very wide range of collider processes.
Note:
  • 5 pages, 3 figures; v2: Comment on ordering added after eq. (6); typos in eqs. (14,16,17) corrected; various cosmetic changes; reference added. Accepted for publication in PRL
  • 11.80.-m
  • 12.38.Bx
  • 12.38.Cy
  • scattering amplitude
  • stability
  • numerical calculations