Amplitude analysis and branching fraction measurement of the decay $D_s^{+}$ → $π^+π^0π^0

• Published in: The journal of high energy physics Vol. 2022; no. 1
• Main Authors: Bai, X. H., Bai, Y., Bakina, O., Baldini Ferroli, R., Begzsuren, K., Bianchi, F., Bloms, J., Cai, X., Calcaterra, A., Chen, M. L., Dbeyssi, A., Du, S. X., Fang, S. S., Fava, L., Fu, C. D., Ge, P. T., Geng, C., Guo, R. P., Han, W. Y., Heng, Y. K., Himmelreich, M., Hussain, T., Irshad, M., Jaeger, S., Ji, Q., Ji, Q. P., Ji, X. B., Jing, M. Q., Johansson, T., Khoukaz, A., Koch, L., Kühn, W., Lei, Z. H., Leithoff, H., Lellmann, M., Li, C. H., Li, P. R., Li, S. Y., Li, W. D., Li, W. G., Li, Z. Y., Liu, C. X., Liu, J. B., Liu, J. L., Liu, J. Y., Liu, L., Liu, P. L., Liu, X., Liu, Z. A., Lou, X. C., Lu, X. L., Luo, C. L., Luo, M. X., Ma, Q. M., Malik, Q. A., Min, T. J., Mitchell, R. E., Mo, X. H., Nisar, S., Ouyang, Q., Pan, Y., Pogodin, S., Prasad, V., Qin, X. P., Qu, S. Q., Shangguan, J. F., Shi, R. S., Sosio, S., Sun, L., Sun, W. Y., Tang, C. J., Uman, I., Wang, C. W., Wang, Meng, Wang, W. H., Wang, Y. Y., Wilkinson, G., Wolke, M., Xu, Q. J., Yan, W. B., Yang, L., Ye, M., Ye, M. H., Yin, J. H., Yuan, Z. Y., Yue, C. X., Zafar, A. A., Zeng, Y., Zhang, J. W., Zhang, L. M., Zhang, S. F., Zhang, X. Y., Zhao, Q., Zhao, Y. B., Zhao, Y. X., Zhou, X. Y., Zhu, A. N., Zhu, K., Zou, B. S., Zou, J. H.
• Format: Journal Article
• Language: English
• Published: United States Springer Nature 12.01.2022
• Subjects: branching fraction; charm physics; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; e+-e− experiments
• ISSN: 1029-8479; 1029-8479

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 $D_s^{+}$ → $π^+π^0π^0$ is performed, and the relative fractions and phases of different intermediate processes are determined. The absolute branching fraction of the decay $D_s^{+}$ → $π^+π^0π^0$ is measured to be (0.50 ± 0.04stat ± 0.02syst)%. The absolute branching fraction of the intermediate process $D_s^{+}$ → $f_o$(980)$π^+$, $f_o$(980) → $π^oπ^o$ is determined to be (0.28 ± 0.04stat ± 0.04syst)%.