η -4He interaction from the dd→ η 4He reaction near threshold

This work is partly supported by the National Natural Science Foundation of China (Grants No.11475227, No. 11735003, No. 11565007, and No. 11747307)and the Youth Innovation Promotion Association CAS (No.2016367). This work is also partly supported by the Spanish Ministerio de Economia y Competitividad and European FEDER funds under the contract number FIS2014-57026-REDT, FIS2014-51948-C2- 1-P, and FIS2014-51948-C2-2-P,and the Generalitat Valenciana in the program Prometeo II2014/068.