Is the magnitude of the Peccei–Quinn scale set by the landscape? Howard Baer, Vernon Barger, Dibyashree Sengupta, Hasan Serce, Kuver Sinha and Robert Wiley Deal Eur. Phys. J. C, 79 11 (2019) 897 Published online: 07 November 2019 DOI: 10.1140/epjc/s10052-019-7408-x