Çetin, Serkant Ali2021-05-072021-05-072020-10-011434-6044https://hdl.handle.net/11411/3651https://doi.org/10.1140/epjc/s10052-020-08447-0We report the first measurement of the absolute branching fraction of the inclusive decay ?c+?KS0X. The analysis is performed using an e+e- collision data sample corresponding to an integrated luminosity of 567 pb - 1 taken at s = 4.6 GeV with the BESIII detector. Using eleven Cabibbo-favored ?¯c- decay modes and the double-tag technique, this absolute branching fraction is measured to be B(?c+?KS0X)=(9.9±0.6±0.4)%, where the first uncertainty is statistical and the second systematic. The relative deviation between the branching fractions for the inclusive decay and the observed exclusive decays is (18.7 ± 8.3) % , which indicates that there may be some unobserved decay modes with a neutron or excited baryons in the final state.eninfo:eu-repo/semantics/openAccessArticle2-s2.0-8509241088510.1140/epjc/s10052-020-08447-0Q1WOS:000582724000002