| Autor: |
Li, Y. B., Shen, C. P., Ban, Y., Nishida, S., Ono, H., Onuki, Y., Pakhlov, P., Pakhlova, G., Pal, B., Pardi, S., Park, S.-H., Paul, S., Pedlar, T. K., Bansal, V., Pestotnik, R., Piilonen, L. E., Popov, V., Prencipe, E., Russo, G., Sakai, Y., Salehi, M., Sandilya, S., Santelj, L., Sanuki, T., Beleño, C., Savinov, V., Schneider, O., Schnell, G., Schueler, J., Schwanda, C., Schwartz, A. J., Seino, Y., Senyo, K., Sevior, M. E., Shibata, T.-A., Berger, M., Shiu, J.-G., Shwartz, B., Solovieva, E., Starič, M., Sumihama, M., Sumiyoshi, T., Sutcliffe, W., Takizawa, M., Tanida, K., Tao, Y., Bhardwaj, V., Tenchini, F., Trabelsi, K., Uchida, M., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Van Tonder, R., Varner, G., Wang, B., Bhuyan, B., Wang, C. H., Wang, M.-Z., Wang, P., Wang, X. L., Won, E., Yang, S. B., Ye, H., Yelton, J., Yin, J. H., Yusa, Y., Bilka, T., Zhang, Z. P., Zhilich, V., Zhukova, V., Belle Collaboration, Biswal, J., Bondar, A., Bozek, A., Yuan, C. Z., Bračko, M., Cao, L., Červenkov, D., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Choi, S.-K., Choi, Y., Cinabro, D., Adachi, I., Cunliffe, S., Di Carlo, S., Doležal, Z., Dong, T. V., Drásal, Z., Eidelman, S., Fast, J. E., Fulsom, B. G., Garg, R., Gaur, V., Aihara, H., Gabyshev, N., Garmash, A., Giri, A., Goldenzweig, P., Greenwald, D., Grube, B., Hayasaka, K., Hayashii, H., Hsu, C.-L., Iijima, T., Al Said, S., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Jia, S., Jin, Y., Joffe, D., Asner, D. M., Joo, K. K., Karyan, G., Kawasaki, T., Kichimi, H., Kim, D. Y., Kim, H. J., Kim, J. B., Kim, K. T., Kim, S. H., Kinoshita, K., Aushev, T., Kodyš, P., Korpar, S., Kotchetkov, D., Križan, P., Kroeger, R., Krokovny, P., Kumita, T., Kuzmin, A., Kwon, Y.-J., Lee, J. Y., Ayad, R., Lee, S. C., Li, L. K., Li Gioi, L., Libby, J., Liventsev, D., Lubej, M., MacNaughton, J., Masuda, M., Matsuda, T., Merola, M., Badhrees, I., Miyabayashi, K., Miyata, H., Mizuk, R., Mohanty, G. B., Mussa, R., Nakano, E., Nakao, M., Nath, K. J., Nayak, M., Niiyama, M. |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Physical review letters 122(8), 082001 (2019). doi:10.1103/PhysRevLett.122.082001 |
| Popis: |
Physical review letters 122(8), 082001 (2019). doi:10.1103/PhysRevLett.122.082001
We present the first measurements of absolute branching fractions of Ξ0c decays into Ξ−π+, ΛK−π+, and pK−K−π+ final states. The measurements are made using a dataset comprising (772±11)×106 B¯B pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB e+e− collider. We first measure the absolute branching fraction for B−→¯Λ−cΞ0c using a missing-mass technique; the result is B(B−→¯Λ−cΞ0c)=(9.51±2.10±0.88)×10−4. We subsequently measure the product branching fractions B(B−→¯Λ−cΞ0c)B(Ξ0c→Ξ−π+), B(B−→¯Λ−cΞ0c)B(Ξ0c→ΛK−π+), and B(B−→¯Λ−cΞ0c)B(Ξ0c→pK−K−π+) with improved precision. Dividing these product branching fractions by the result for B−→¯Λ−cΞ0c yields the following branching fractions: B(Ξ0c→Ξ−π+)=(1.80±0.50±0.14)%, B(Ξ0c→ΛK−π+)=(1.17±0.37±0.09)%, and B(Ξ0c→pK−K−π+)=(0.58±0.23±0.05)%. For the above branching fractions, the first uncertainties are statistical and the second are systematic. Our result for B(Ξ0c→Ξ−π+) can be combined with Ξ0c branching fractions measured relative to Ξ0c→Ξ−π+ to yield other absolute Ξ0c branching fractions.
Published by Published by the American Physical Society, College Park, Md. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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