Study of Λ b →Λρ 0, pK ∗− and pρ − decays in the non-universal Z′ model Shuai-Wei Wang, Guo-Liang Sun, Xing-Qiang Yang and Jin-Shu Huang Eur. Phys. J. C, 72 1 (2012) 1852 Published online: 03 January 2012 DOI: 10.1140/epjc/s10052-011-1852-6