CP violation induced by the double resonance for pure annihilation decay process in perturbative QCD Gang Lü, Ye Lu, Sheng-Tao Li and Yu-Ting Wang Eur. Phys. J. C, 77 8 (2017) 518 Published online: 04 August 2017 DOI: 10.1140/epjc/s10052-017-5091-3