We compute the part of the two-loop virtual amplitude for the process gg→V1V2→(l1lˉ1′)(l2lˉ2′), where V1,2 are arbitrary electroweak gauge bosons, that receives contributions from loops of massless quarks. Invariant masses of electroweak bosons are allowed to be different from each other. Our result provides an important ingredient for improving the description of gluon fusion contribution to the production of four-lepton final states at the LHC.
@article{arxiv.1503.08759,
title = {Two-loop helicity amplitudes for the production of two off-shell electroweak bosons in gluon fusion},
author = {Fabrizio Caola and Johannes M. Henn and Kirill Melnikov and Alexander V. Smirnov and Vladimir A. Smirnov},
journal= {arXiv preprint arXiv:1503.08759},
year = {2015}
}
Comments
15 pages, 1 table, 2 figures; v2: typo in the references corrected