Impact of family-non-universal boson on pure annihilation and decays Ying Li, Wen-Long Wang, Dong-Shuo Du, Zuo-Hong Li and Hong-Xia Xu Eur. Phys. J. C, 75 7 (2015) 328 Published online: 17 July 2015 DOI: 10.1140/epjc/s10052-015-3552-0