Two-Loop Electroweak Corrections with Fermion Loops to $e^+ e^- \to ZH$
High Energy Physics - Phenomenology
2023-02-01 v2
Abstract
We present a complete calculation of the next-to-next-to-leading (NNLO) electroweak corrections involving closed fermion loops to the process. This has been achieved by using a semi-numerical technique for the two-loop vertex and box diagrams, which is based on Feynman parameters and dispersion relations for one of the two sub-loops. UV divergences are treated with suitable subtraction terms. Numerical results for the unpolarized differential and integrated cross-section at center-of-mass energy are provided. Combining the NNLO contributions with one and two closed fermions loops, they are found to increase the NLO cross-section by 0.7\%.
Keywords
Cite
@article{arxiv.2209.07612,
title = {Two-Loop Electroweak Corrections with Fermion Loops to $e^+ e^- \to ZH$},
author = {Ayres Freitas and Qian Song},
journal= {arXiv preprint arXiv:2209.07612},
year = {2023}
}
Comments
6 pages, 3 figures, 1 table. Ref.8 is changed