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Achasov, M. N.; Amoroso, A.; Bortone, A.; Calcaterra, A.; Chang, J. F.; Chen, G.; Chen, M. L.; Cheng, W. S.; Cui, J. J.; Dai, H. L.; Dbeyssi, A.; Fava, L.; Felici, G.; Fritsch, M.; Fritzsch, C.; Gao, H.; Gu, M. H.; Guo, A. Q.; Guo, L. B.; Hu, H. M.; Hu, T.; Ji, Q.; Ji, X. L.; Jia, Z. K.; Jiao, J. B.; Jin, S.; Ke, B. C.; Keshk, I. K.; Koch, L.; Kopf, B.; Larin, P.; Lavania, A.; Li, Hui; Li, P. R.; Liang, H.; Libby, J.; Limphirat, A.; Lin, D. X.; Liu, C. X.; Liu, Fang; Liu, H.; Liu, J. B.; Liu, J. L.; Liu, X.; Liu, Y.; Liu, Z. A.; Luo, T.; Lyu, X. R.; Ma, F. C.; Maldaner, S.; Mao, Y. J.; Meng, Z. X.; Mo, X. H.; Muchnoi, N. Yu; Nerling, F.; Nikolaev, I. B.; Pacetti, S.; Qi, T. Y.; Qian, S.; Redmer, C. F.; Schelhaas, Y.; Schoenning, K.; Shao, L. G.; Shen, C. P.; Shen, H. F.; Shen, X. Y.; Shi, J. Y.; Shi, X.; Song, J. J.; Sun, G. X.; Sun, L.; Sun, W. Y.; Tang, J.; Tat, M.; Teng, J. X.; Wang, B.; Wang, F.; Wang, S.; Wang, W.; Wang, X.; Wang, X. F.; Wang, Z.; Wu, Y.; Xiang, T.; Xiao, G. Y.; Xiao, H.; Xiao, Z. J.; Yan, F.; Yang, Yifan; Yu, C. X.; Yuan, Z. Y.; Zhai, X. Y.; Zhan, Y. H.; Zhang, Yao; Zhao, J. Y.; Zhao, M. G.; Zhao, Z. G.; Zhemchugov, A.; Zhu, L. X.; Zhu, S. H.
Physical review. D, 8/2023, Volume: 108, Issue: 3Journal Article
Using an e+e– collision data sample with a total integrated luminosity of 3.19 fb–1 collected with the BESIII detector at a center-of-mass energy of 4.178 GeV, the branching fraction of the inclusive decay of the $D^+_ S$ meson to final states including at least three charged pions is measured for the first time to be $\mathscr{B}$($D^+_ S$→π+π+π–X)=(32.81 ± 0.35stat ±0.63syst)%. In this measurement the charged pions from $K^0_S$ meson decays are excluded. The partial branching fractions of $D^+_ S$→π+π+π–X are also measured as a function of the π+π+π– invariant mass.
