Amplitude analysis and branching fraction measurement of the decay Ds+ ? ? + ? 0 ? 0

Abstract

Abstract: Using a data set corresponding to an integrated luminosity of 6.32 fb?1 recorded by the BESIII detector at center-of-mass energies between 4.178 and 4.226 GeV, an amplitude analysis of the decay Ds+ ? ?+?0?0 is performed, and the relative fractions and phases of different intermediate processes are determined. The absolute branching fraction of the decay Ds+ ? ?+?0?0 is measured to be (0.50 ± 0.04stat ± 0.02syst)%. The absolute branching fraction of the intermediate process Ds+ ? f0(980)?+, f0(980) ? ?0?0 is determined to be (0.28 ± 0.04stat ± 0.04syst)%. [Figure not available: see fulltext.] © 2022, The Author(s).