AIP Conference Proceedings [AIP Publishing XIAMEN-CUSTIPEN WORKSHOP ON THE EQUATION OF STATE OF DENSE NEUTRON-RICH MATTER IN THE ERA OF GRAVITATIONAL WAVE ASTRONOMY - Xiamen, China (3–7 January 2019)] XIAMEN-CUSTIPEN WORKSHOP ON THE EQUATION OF STATE OF DENSE NEUTRON-RICH MATTER IN THE ERA OF GRAVITATIONAL WAVE ASTRONOMY - Mean-field potential effects in the cumulants of baryons from central Au+Au collision at Elab= 1.23 GeV/nucleon