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+ → π+π0π0 is performed, and the relative fractions and phases of different intermediate processes are determined. The absolute branching fraction of the decay Ds+ → π+π0π0 is measured to be (0.50 ± 0.04stat ± 0.02syst)%. The absolute branching fraction of the intermediate process Ds+ → f0(980)π+, f0(980) → π0π0 is determined to be (0.28 ± 0.04stat ± 0.04syst)%. [Figure not available: see fulltext.]
Amplitude analysis and branching fraction measurement of the decay Ds+ → π + π 0 π 0
Amoroso A.
;Bianchi F.
;Bortone A.
;Destefanis M.
;De Mori F.
;Fava L.
;Greco M.
;Hu J. F.
;Lavezzi L.
;Maggiora M.
;Marcello S.
;Rivetti A.
;Sosio S.
;Spataro S.
;Yan L.
;
2022-01-01
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+ → π+π0π0 is performed, and the relative fractions and phases of different intermediate processes are determined. The absolute branching fraction of the decay Ds+ → π+π0π0 is measured to be (0.50 ± 0.04stat ± 0.02syst)%. The absolute branching fraction of the intermediate process Ds+ → f0(980)π+, f0(980) → π0π0 is determined to be (0.28 ± 0.04stat ± 0.04syst)%. [Figure not available: see fulltext.]File in questo prodotto:
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