Measurements of branching fractions and asymmetry parameters of Ξc0→ΛK¯∗0, Ξc0→Σ0K¯∗0, and Ξc0→Σ+K∗− decays at Belle

A bstract Using a data sample of 980 fb − 1 collected with the Belle detector at the KEKB asymmetric-energy e + e − collider, we study the processes of Ξ c 0 → Λ K ¯ ∗ 0 , Ξ c 0 → Σ 0 K ¯ ∗ 0 , and Ξ c 0 → Σ + K ∗ − for the first time. The relative branching ratios to the normalization mode of Ξ c 0...

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Veröffentlicht in:The journal of high energy physics 2021-06, Vol.2021 (6)
Hauptverfasser: Tang, S. S., Shen, C. P., Adachi, I., Aihara, H., Aulchenko, V., Aushev, T., Bahinipati, S., Bennett, J., Bessner, M., Bilka, T., Biswal, J., Bobrov, A., Bračko, M., Browder, T. E., Campajola, M., Chilikin, K., Cho, H. E., Cho, K., Cho, S.-J., Choi, S.-K., Cinabro, D., Di Capua, F., Dong, T. V., Epifanov, D., Ferber, T., Flood, K., Fulsom, B. G., Garg, R., Garmash, A., Hartbrich, O., Hayasaka, K., Hayashii, H., Hou, W.-S., Hsu, C.-L., Iijima, T., Itoh, R., Jacobs, W. W., Jin, Y., Joo, K. K., Karyan, G., Kato, Y., Kichimi, H., Kim, S. H., Kim, Y.-K., Kinoshita, K., Kodyš, P., Konno, T., Korobov, A., Kovalenko, E., Križan, P., Kuhr, T., Kuzmin, A., Lalwani, K., Lange, J. S., Li, L. K., Libby, J., Masuda, M., Merola, M., Miyabayashi, K., Miyata, H., Nakao, M., Natochii, A., Nayak, L., Niiyama, M., Nisar, N. K., Ogawa, S., Oskin, P., Pakhlov, P., Podobnik, T., Popov, V., Prencipe, E., Prim, M. T., Sahoo, D., Sandilya, S., Savinov, V., Seino, Y., Senyo, K., Sevior, M. E., Sharma, C., Sokolov, A., Solovieva, E., Stottler, Z. S., Takizawa, M., Tanida, K., Tenchini, F., Uehara, S., Unno, Y., Uno, S., Van Tonder, R., Varner, G., Waheed, E., Wang, M.-Z., Wang, P., Yabsley, B. D., Yan, W., Yang, S. B., Ye, H., Yin, J. H., Zhang, Z. P., Zhukova, V.
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Zusammenfassung:A bstract Using a data sample of 980 fb − 1 collected with the Belle detector at the KEKB asymmetric-energy e + e − collider, we study the processes of Ξ c 0 → Λ K ¯ ∗ 0 , Ξ c 0 → Σ 0 K ¯ ∗ 0 , and Ξ c 0 → Σ + K ∗ − for the first time. The relative branching ratios to the normalization mode of Ξ c 0 → Ξ − π + are measured to be B Ξ c 0 → Λ K ¯ ∗ 0 / B Ξ c 0 → Ξ − π + = 0.18 ± 0.02 stat . ± 0.01 syst . , B Ξ c 0 → Σ 0 K ¯ ∗ 0 / B Ξ c 0 → Ξ − π + = 0.69 ± 0.03 stat . ± 0.03 syst . , B Ξ c 0 → Σ + K ∗ − / B Ξ c 0 → Ξ − π + = 0.34 ± 0.06 stat . ± 0.02 syst . , where the uncertainties are statistical and systematic, respectively. We obtain B Ξ c 0 → Λ K ¯ ∗ 0 = 3.3 ± 0.3 stat . ± 0.2 syst . ± 1.0 ref . × 10 − 3 , B Ξ c 0 → Σ 0 K ¯ ∗ 0 = 12.4 ± 0.5 stat . ± 0.5 syst . ± 3.6 ref . × 10 − 3 , B Ξ c 0 → Σ + K ∗ 0 = 6.1 ± 1.0 stat . ± 0.4 syst . ± 1.8 ref . × 10 − 3 , where the uncertainties are statistical, systematic, and from B Ξ c 0 → Ξ − π + , respectively. The asymmetry parameters α Ξ c 0 → Λ K ¯ ∗ 0 and α Ξ c 0 → Σ + K ∗ − are 0 . 15 ± 0 . 22(stat . ) ± 0 . 04(syst . ) and − 0 . 52 ± 0 . 30(stat . ) ± 0 . 02(syst . ), respectively, where the uncertainties are statistical followed by systematic.
ISSN:1029-8479
DOI:10.1007/JHEP06(2021)160