Search for the X-b and other hidden-beauty states in the pi(+)pi(-)gamma(1S) channel at ATLAS (Physics Letters B, 2015)

(untitled) - Aad, G; Abbott, B; Abdallah, J; Khalek, SA; Abdinov, O; Aben, R; Abi, B; Abolins, M; AbouZeid, O; Abramowicz, H; Abreu, H; Abreu, R; et al.