Measurement of B(J/psi -> eta ' e(+)e(-)) and search for a dark photon

Ablikim, M; Achasov, MN; Ahmed, S; Albrecht, M; Alekseev, M; Amoroso, A; An, FF; An, Q; Bai, JZ; Bai, Y; Bakina, O; Ferroli, RB; Ban, Y; Begzsuren, K; Bennett, DW; Bennett, JV; Berger, N; Bertani, M; Bettoni, D; Bianchi, F; Boger, E; Boyko, I; Briere

Li, FY (reprint author), Peking Univ, Beijing 100871, Peoples R China.

PHYSICAL REVIEW D, 2019; 99 (1):