Program: | q2e, exp |

Keywords: | Asymptotic expansion, large momenta, hard masses, automated calculations |

Authors: | R. Harlander, T. Seidensticker, M. Steinhauser |

Short description: | Asymptotic expansions constitute an important tool for the
evaluation of Feynman diagrams in particle physics. The combination of
the programs q2e and exp perform the asymptotic expansion at
the symbolic level in an automated way.
q2e: re-write Qgraf output in FORM notation. exp: use the output of q2e, apply the asymptotic expansion and generate FORM code for each subdiagram. |

(PDF description) |

- R. Harlander, T. Seidensticker and M. Steinhauser, Complete corrections of Order alpha alpha-s to the decay of the Z boson into bottom quarks, Phys. Lett. B 426 (1998) 125, arXiv:hep-ph/9712228.

q2e and exp have been used in a variety of phenomenological
problems. The first application was the computation of
top quark mass suppressed terms to the decay of Z boson to bottom
quarks to order αα_{s}.

q2e and exp are available from the authors.

We ask you to refer to

R. Harlander, T. Seidensticker and M. Steinhauser, arXiv:hep-ph/9712228.

T.~Seidensticker, arXiv:hep-ph/9905298.

if you use q2e/exp in scientific publications.

Available from the authors.