Peccei–Quinn symmetric pure gravity mediation Jason L. Evans, Masahiro Ibe, Keith A. Olive and Tsutomu T. Yanagida Eur. Phys. J. C, 74 7 (2014) 2931 Published online: 01 July 2014 DOI: 10.1140/epjc/s10052-014-2931-2