Improving the Drell–Yan probe of small x partons at the LHC via an azimuthal angle cut M. Kendi Yamasaki and Emmanuel G. de Oliveira Eur. Phys. J. C, 80 4 (2020) 327 Published online: 18 April 2020 DOI: 10.1140/epjc/s10052-020-7901-2