Amplitude analysis and branching-fraction measurement of Ds+ → π + π 0 η′
Künye
Ablikim, M., Achasov, M. N., Adlarson, P., Ahmed, S., Albrecht, M., Aliberti, R., ... & Koch, L. (2022). Amplitude analysis and branching-fraction measurement of D s+ $${\mathrm {D}} _ {\mathrm {s}}^{+} $$→ π+ π0η′. Journal of High Energy Physics, 2022(4), 1-26.Özet
Using data collected with the BESIII detector in e+e− collisions at center-of-mass energies between 4.178 and 4.226 GeV and corresponding to 6.32 fb−1 of integrated luminosity, we report the amplitude analysis and branching-fraction measurement of the Ds+→ π+π0η′ decay. We find that the dominant intermediate process is Ds+→ ρ+η′ and the significances of other resonant and nonresonant processes are all less than 3σ. The upper limits on the branching fractions of S-wave and P-wave nonresonant components are set to 0.10% and 0.74% at the 90% confidence level, respectively. In addition, the branching fraction of the Ds+→ π+π0η′ decay is measured to be (6.15 ± 0.25(stat.) ± 0.18(syst.))%, which receives significant contribution only from Ds+→ ρ+η′ according to the amplitude analysis. [Figure not available: see fulltext.]. © 2022, The Author(s).
