Amplitude analysis and branching fraction measurement of the decay D+ → KS0 π+ π0 π0
Künye
Kalantar-Nayestanaki, N., Kappert, R., Kavatsyuk, M., Messchendorp, J., Rodin, V., & BESIII Collaboration. (2023). Amplitude analysis and branching fraction measurement of the decay D+→ KS0 π+ π0 π0. Journal of High Energy Physics, 2023(9), 77.Özet
Using 2.93 fb−1 of e+ e− collision data collected with the BESIII detector at the center-of-mass energy 3.773 GeV, we perform the first amplitude analysis of the decay D+ → KS0 π+ π0 π0 and determine the relative magnitudes and phases of different intermediate processes. The absolute branching fraction of D+ → KS0 π+ π0 π0 is measured to be (2.888 ± 0.058stat. ± 0.069syst.)%. The dominant intermediate processes are D+ → KS0 a 1(1260)+(→ ρ+ π0) and D+ → K¯*0 ρ+, with branching fractions of (8.66 ± 1.04stat. ± 1.39syst.) × 10−3 and (9.70 ± 0.81stat. ± 0.53syst.) × 10−3, respectively. [Figure not available: see fulltext.] © 2023, The Author(s).