General one-loop formulas for decay L. T. Hue, A. B. Arbuzov, T. T. Hong, T. Phong Nguyen, D. T. Si and H. N. Long Eur. Phys. J. C, 78 11 (2018) 885 Published online: 31 October 2018 DOI: 10.1140/epjc/s10052-018-6349-0