Event plane determination from the zero degree calorimeter at the Cooling Storage Ring external-target experiment

Data files for paper titled "Event plane determination from the zero degree calorimeter at the Cooling Storage Ring external-target experiment".Including: the 1st order event plane resolution with different mode from ZDC simulation U+U sNN= 2.1 GeV, the rapidity and mass dependence of the directed and elliptical flows for p, d, t, 3He, and 4He at 2.1 GeV U+U collisions comparing the HAEDS and STAR results.The data saved into root(CERN) files and txt files.