Amplitude analysis and branching-fraction measurement of D+s → π + π 0 η

• Published in: The journal of high energy physics Vol. 2022; no. 4; pp. 1 - 26
• Main Authors: Ablikim, M., Adlarson, Patrik, Johansson, Tord, Kupsc, Andrzej, Pettersson, Joachim, Schönning, Karin, Thorén, Viktor, Wolke, Magnus, Zou, J. H.
• Format: Journal Article
• Language: English
• Published: SpringerOpen 01-04-2022
• Subjects: Branching fraction; Charm Physics; e +-e − Experiments; e(+)-e(-) Experiments; Particle and Resonance Production
• ISSN: 1029-8479; 1126-6708; 1029-8479
• DOI: 10.1007/JHEP04(2022)058

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 D-s(+) -> pi(+)pi(0)eta' decay. We find that the dominant intermediate process is D-s(+) -> rho(+)eta' and the significances of other resonant and nonresonant processes are all less than 3 sigma. 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 D-s(+) -> pi(+)pi(0)eta' decay is measured to be (6.15 +/- 0.25(stat.) +/- 0.18(syst.))%, which receives significant contribution only from D-s(+) -> rho(+)eta' according to the amplitude analysis.