Amplitude analysis and branching-fraction measurement of $\mathrm{D}^+_s$ → $π^+π^oη

• Published in: The journal of high energy physics Vol. 2022; no. 4
• Main Authors: Ablikim, M., Bai, X. H., Bai, Y., Bakina, O., Begzsuren, K., Bettoni, D., Bianchi, F., Bloms, J., Cai, X., Calcaterra, A., Chelkov, G., Chen, G., Chen, M. L., Dbeyssi, A., Du, S. X., Fang, S. S., Fava, L., Fu, C. D., Ge, P. T., Geng, C., Guan, C. Y., Han, T. T., Held, T., Huang, Y. P., Imoehl, W., Janchiv, S., Ji, X. B., Johansson, T., Kang, X. S., Kiese, P., Koch, L., Kolcu, O. B., Kuessner, M., Lellmann, M., Li, H. J., Li, J. S., Li, K., Li, L. K., Li, P. R., Li, W. D., Liu, C. X., Liu, L., Liu, P. L., Liu, T., Lou, X. C., Lu, F. X., Lu, X. L., Luo, C. L., Lyu, X. R., Ma, X. X., Maas, F. E., Malik, Q. A., Meng, Z. X., Min, T. J., Mo, X. H., Mo, Y. J., Nisar, S., Patteri, P., Pelizaeus, M., Peng, H. P., Prasad, V., Qin, X. P., Qu, S. Q., Shangguan, J. F., Shi, R. S., Sosio, S., Sun, L., Sun, W. Y., Tang, C. J., Thoren, V., Uman, I., Wang, C. W., Wang, K., Wang, L. L., Wang, W. H., Wang, Y. Y., Wang, Z. Y., Wen, S. P., Wiedner, U., Wollenberg, L., Wu, L. J., Wu, Z., Xia, L., Xiao, S. Y., Xing, T. Y., Yang, H. X., Yang, Y. X., You, Z. Y., Zhang, A. Q., Zhang, G., Zhang, J. L., Zhang, J. Z., Zhang, Y. H., Zhang, Z. H., Zhao, G., Zhao, J. Z., Zhao, S. J., Zheng, Y., Zhou, Q., Zhou, X.
• Format: Journal Article
• Language: English
• Published: United States Springer Nature 08.04.2022
• Subjects: branching fraction; charm physics; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; e+-e− experiments; particle and resonance production
• ISSN: 1029-8479; 1029-8479

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 $\mathrm{D}^+_s$ → $π^+π^oη'$ decay. We find that the dominant intermediate process is $\mathrm{D}^+_s$ →$ρ^+η'$ 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 $\mathrm{D}^+_s$ → $π^+π^oη'$ decay is measured to be (6.15 ± 0.25(stat.) ± 0.18(syst.))%, which receives significant contribution only from $\mathrm{D}^+_s$ →$ρ^+η'$ according to the amplitude analysis.