Evidence of charged $\Xi_{c}(2930)$ and updated measurement of $B^{0} \to K^{0} \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-}$ at Belle

+K0%28S%29+Lambda%2Fc%2B%22&type=SU">Xi/c(2930) --> K0(S) Lambda/c+, B0 --> K0(S) Lambda/c+ Antilambda/c+, hadronic decay [Xi/c(2930)], energy [electron positron], pair production [B], baryon, electroproduction [Upsilon(10570)], colliding beams [electron positron], upper limit [branching ratio], High Energy Physics::Experiment, experimental results -->
Popis: We report evidence for the charged charmed-strange baryon $\Xi_{c}(2930)$ with a signal significance of 3.9$\sigma$. The charged $\Xi_{c}(2930)$ is found in its decay to $K_{S}^{0} \Lambda_{c}$ in the substructure of $B^{0} \to K^{0}_{S} \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-}$ decays. The measured mass and width are $[2942.3 \pm 4.4 (\rm stat.) \pm 1.6(\rm syst.)]$~MeV/$c^{2}$ and $[14.8 \pm 8.8(\rm stat.) \pm 7.1(\rm syst.)]$~MeV, respectively, and the product branching fraction is ${\cal B}(B^{0} \to \Xi_{c}^{+}(2930) \bar{\Lambda}_{c}^{-}) {\cal B}(\Xi_{c}^{+}(2930)\to K^{0} \Lambda_{c}^{+})=[2.28 \pm 0.49(\rm stat.) \pm 0.29(\rm syst.)]\times 10^{-4}$. We also measure ${\cal B}(B^{0} \to K^{0} \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-}) = [3.84 \pm 0.73(\rm stat.) \pm 0.48(\rm syst.)] \times 10^{-4}$ with greater precision than previous experiments, and present the results of a search for the charmonium-like state $Y(4660)$ and its spin partner, $Y_{\eta}$, in the $\Lambda_{c}^{+}\bar{\Lambda}_{c}^{-}$ invariant mass spectrum. No clear signals of the $Y(4660)$ or $Y_{\eta}$ are observed and the 90\% credibility level (C.L.) upper limits on their production rates are determined. These measurements are obtained from a sample of $(772\pm11)\times 10^{6} B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance by the Belle detector at the KEKB asymmetric energy electron-positron collider.
Jazyk: English
DOI: 10.1140/epjc/s10052-018-6425-5
DOI: 10.3204/PUBDB-2018-03267
Přístupová URL adresa: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::a8dc9ee623376c2fc78b16370c76664d
https://bib-pubdb1.desy.de/record/416509
Rights: OPEN
Přírůstkové číslo: edsair.dedup.wf.001..a8dc9ee623376c2fc78b16370c76664d
Autor: Li, Y. B., Shen, C. P., Bahinipati, S., Mussa, R., Nakano, E., Nanut, T., Nath, K. J., Natkaniec, Z., Nayak, M., Nisar, N. K., Nishida, S., Nishimura, K., Ogawa, K., Ban, Y., Okuno, S., Ono, H., Pakhlov, P., Pakhlova, G., Pal, B., Pardi, S., Park, H., Paul, S., Pedlar, T. K., Pestotnik, R., Bansal, V., Piilonen, L. E., Popov, V., Prencipe, E., Rostomyan, A., Russo, G., Sakai, Y., Salehi, M., Sandilya, S., Santelj, L., Sanuki, T., Behera, P., Savinov, V., Schneider, O., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Seon, O., Sevior, M. E., Shibata, T.-A., Shiu, J.-G., Beleño, C., Solovieva, E., Starič, M., Strube, J. F., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Bhardwaj, V., Uglov, T., Unno, Y., Uno, S., Usov, Y., Van Hulse, C., Van Tonder, R., Varner, G., Varvell, K. E., Vorobyev, V., Waheed, E., Bhuyan, B., Wang, B., Wang, C. H., Wang, M.-Z., Wang, P., Wang, X. L., Watanuki, S., Widmann, E., Won, E., Ye, H., Yelton, J., Biswal, J., Yin, J. H., Yuan, C. Z., Yusa, Y., Zhang, Z. P., Zhilich, V., Zhukova, V., Zhulanov, V., Belle Collaboration, Bobrov, A., Bozek, A., Adachi, I., Bračko, M., Browder, T. E., Cao, L., Červenkov, D., Chang, P., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Aihara, H., Choi, S.-K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Dash, N., Di Carlo, S., Dingfelder, J., Doležal, Z., Dong, T. V., Al Said, S., Drásal, Z., Eidelman, S., Epifanov, D., Fast, J. E., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Gelb, M., Asner, D. M., Giri, A., Goldenzweig, P., Golob, B., Haba, J., Hayasaka, K., Hirose, S., Hou, W.-S., Iijima, T., Inami, K., Inguglia, G., Aushev, T., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Jaegle, I., Jeon, H. B., Jia, S., Jin, Y., Joo, K. K., Ayad, R., Kaliyar, A. B., Kang, K. H., Kato, Y., Kawasaki, T., Kim, D. Y., Kim, J. B., Kim, S. H., Kinoshita, K., Kodyš, P., Korpar, S., Babu, V., Kotchetkov, D., Križan, P., Kroeger, R., Krokovny, P., Kuhr, T., Kwon, Y.-J., Lange, J. S., Lee, I. S., Lee, S. C., Li, L. K., Badhrees, I., Li Gioi, L., Libby, J., Liventsev, D., Luo, T., Matvienko, D., Merola, M., Miyata, H., Mizuk, R., Moon, H. K., Mori, T.
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: The European physical journal / C 78(11), 928 (2018). doi:10.1140/epjc/s10052-018-6425-5
DOI: 10.1140/epjc/s10052-018-6425-5
Popis: We report evidence for the charged charmed-strange baryon $\Xi_{c}(2930)$ with a signal significance of 3.9$\sigma$. The charged $\Xi_{c}(2930)$ is found in its decay to $K_{S}^{0} \Lambda_{c}$ in the substructure of $B^{0} \to K^{0}_{S} \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-}$ decays. The measured mass and width are $[2942.3 \pm 4.4 (\rm stat.) \pm 1.6(\rm syst.)]$~MeV/$c^{2}$ and $[14.8 \pm 8.8(\rm stat.) \pm 7.1(\rm syst.)]$~MeV, respectively, and the product branching fraction is ${\cal B}(B^{0} \to \Xi_{c}^{+}(2930) \bar{\Lambda}_{c}^{-}) {\cal B}(\Xi_{c}^{+}(2930)\to K^{0} \Lambda_{c}^{+})=[2.28 \pm 0.49(\rm stat.) \pm 0.29(\rm syst.)]\times 10^{-4}$. We also measure ${\cal B}(B^{0} \to K^{0} \Lambda_{c}^{+} \bar{\Lambda}_{c}^{-}) = [3.84 \pm 0.73(\rm stat.) \pm 0.48(\rm syst.)] \times 10^{-4}$ with greater precision than previous experiments, and present the results of a search for the charmonium-like state $Y(4660)$ and its spin partner, $Y_{\eta}$, in the $\Lambda_{c}^{+}\bar{\Lambda}_{c}^{-}$ invariant mass spectrum. No clear signals of the $Y(4660)$ or $Y_{\eta}$ are observed and the 90\% credibility level (C.L.) upper limits on their production rates are determined. These measurements are obtained from a sample of $(772\pm11)\times 10^{6} B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance by the Belle detector at the KEKB asymmetric energy electron-positron collider.
Databáze: OpenAIRE
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