Helicity amplitudes without gauge cancellation for electroweak processes Junmou Chen, Kaoru Hagiwara, Junichi Kanzaki and Kentarou Mawatari Eur. Phys. J. C, 83 10 (2023) 922 Published online: 13 October 2023 DOI: 10.1140/epjc/s10052-023-12093-7