Partial wave analysis of the charmed baryon hadronic decay Λc+→ Λπ+π0

• Published in: The journal of high energy physics 2022-12, Vol.2022 (12), p.33
• Main Authors: Balossino, I., Bettoni, D., Chen, G., Chen, S. J., Chen, Y. B., Cheng, W. S., Deng, Z. Y., Du, S. X., Fang, J., Fu, C. D., Gao, H., Gu, M. H., Guo, A. Q., Hu, H. M., Hu, T., Huang, Z., Hussain, T., Jackson, J., Janchiv, S., Jang, E., Ji, Q. P., Jiang, H. B., Keshk, I. K., Koch, L., Kolcu, O. B., Kuessner, M., Lange, J. S., Larin, P., Lavania, A., Li, C., Li, D. M., Li, H., Li, H. B., Li, J. Q., Li, J. W., Li, X. H., Limphirat, A., Lin, T., Liu, H. B., Liu, J. B., Liu, J. Y., Liu, W. K., Liu, Z. Q., Lu, F. X., Malde, S., Mao, Y. J., Marcello, S., Muchnoi, N. Yu, Nikolaev, I. B., Ning, Z., Nisar, S., Ouyang, Q., Qiu, J. F., Rodin, V., Shao, L. G., Shao, M., Shen, X. Y., Shi, Q. Q., Shi, R. S., Song, J. J., Stieler, F., Tang, J., Tian, W. H., Wang, B., Wang, D. Y., Wang, H. J., Wang, L. L., Wang, M., Wang, W. P., Wang, Y. D., Wang, Yaqian, Wang, Ziyi, Wu, X., Wu, Y. J, Xie, X. H., Xie, Y. H., Xing, T. Y., Xu, Q. J., Xu, Y. C., Yang, H. L., Ye, M., Yin, J. H., Yu, T., Yuan, Z. Y., Zeng, F. R., Zeng, X. Zeng, Zhang, A. Q., Zhang, J. X., Zhang, Q. Y., Zhang, X. M., Zhang, X. Y., Zhang, Yan, Zhang, Z. Y., Zhao, Lei, Zhao, M. G., Zheng, J. P., Zhong, C., Zhou, H., Zhu, J., Zhu, S. H.
• Format: Article
• Language: English
• Subjects: Asymmetry; Baryons; Charm (particle physics); Classical and Quantum Gravitation; Collaboration; Decay; Elementary Particles; Fractions; High energy physics; Luminosity; Monte Carlo simulation; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Quarks; Regular Article - Experimental Physics; Relativity Theory; String Theory; Symmetry; Uncertainty
• ISSN: 1029-8479
• DOI: 10.1007/JHEP12(2022)033

A bstract Based on e + e − collision samples corresponding to an integrated luminosity of 4.4 fb − 1 collected with the BESIII detector at center-of-mass energies between 4 . 6 GeV and 4 . 7 GeV, a partial wave analysis of the charmed baryon hadronic decay Λ c + → Λ π + π 0 is performed, and the decays Λ c + → Λ ρ (770) + and Λ c + → Σ(1385) π are studied for the first time. Making use of the world-average branching fraction B Λ c + → Λ π + π 0 , their branching fractions are determined to be B Λ c + → Λ ρ 770 + = 4.06 ± 0.30 ± 0.35 ± 0.23 × 10 − 2 , B Λ c + → Σ 1385 + π 0 = 5.86 ± 0.49 ± 0.52 ± 0.35 × 10 − 3 , B Λ c + → Σ 1385 0 π + = 6.47 ± 0.59 ± 0.66 ± 0.38 × 10 − 3 , where the first uncertainties are statistical, the second are systematic, and the third are from the uncertainties of the branching fractions B Λ c + → Λ π + π 0 and B Σ 1385 → Λ π . In addition, the decay asymmetry parameters are measured to be α Λ ρ (770)+  =  − 0.763 ± 0.053 ± 0.045, α Σ 1385 + π 0 = − 0.917 ± 0.069 ± 0.056 , and α Σ 1385 0 π + = − 0.789 ± 0.098 ± 0.056 .