Revisiting the B→πρ, πω decays in the perturbative QCD approach beyond the leading order Zhou Rui, Gao Xiangdong and Cai-Dian Lü Eur. Phys. J. C, 72 3 (2012) 1923 Published online: 14 March 2012 DOI: 10.1140/epjc/s10052-012-1923-3