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Title: Evidence of a structure in $$\bar{K}^{0} \Lambda _{c}^{+}$$K¯0Λc+ consistent with a charged $$\Xi _c(2930)^{+}$$Ξc(2930)+, and updated measurement of $$\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$B¯0→K¯0Λc+Λ¯c- at Belle

Abstract

We report evidence for the charged charmed-strange baryon Ξ c(2930) + with a signal significance of 3.9 σ with systematic errors included. The charged Ξ c(2930) + is found in its decay to K$$0\atop{S}$$Λ$$+\atop{c}$$ in the substructure of $$\bar{B}$$ 0→K$$0\atop{S}$$Λ$$+\atop{c}$$ $$\bar{Λ}$$ $$\bar{c}$$ decays. The measured mass and width are [2942.3±4.4(stat.)±1.5(syst.)] MeV/c 2 and [14.8±8.8(stat.)±2.5(syst.)] MeV, respectively, and the product branching fraction is B($$\bar{B^0}$$→Ξ c(2930) +$$\bar{Λ}$$ $$\bar{c}$$)B(Ξ c(2930) +→$$\bar{K}^0$$Λ$$+\atop{c}$$)=[2.37±0.51(stat.)±0.31(syst.)]×10 -4. We also measure B($$\bar{B^0}$$→$$\bar{K}^0$$Λ$$+\atop{c}$$ $$\bar{Λ}$$ $$-\atop{c}$$)=[3.99±0.76(stat.)±0.51(syst.)]×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 η, in the Λ$$+\atop{c}$$ $$\bar{Λ}$$ $$-\atop{c}$$ invariant mass spectrum. No clear signals of the Y(4660) or Y η 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±11)×10 6$$B\bar{B}$$ pairs collected at the Υ(4S) resonance by the Belle detector at the KEKB asymmetric energy electron-positron collider.

Authors:
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Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
Belle Collaboration
OSTI Identifier:
1484169
Report Number(s):
BNL-209529-2018-JAAM
Journal ID: ISSN 1434-6044
Grant/Contract Number:  
SC0012704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 78; Journal Issue: 11; Journal ID: ISSN 1434-6044
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Li, Y. B., Shen, C. P., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Aushev, T., Ayad, R., Babu, V., Badhrees, I., Bahinipati, S., Ban, Y., Bansal, V., Behera, P., Beleño, C., Bhardwaj, V., Bhuyan, B., Biswal, J., Bobrov, A., Bozek, A., Bračko, M., Browder, T. E., Cao, L., Červenkov, D., Chang, P., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Choi, S. -K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Dash, N., Di Carlo, S., Dingfelder, J., Doležal, Z., Dong, T. V., Drásal, Z., Eidelman, S., Epifanov, D., Fast, J. E., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Gelb, M., Giri, A., Goldenzweig, P., Golob, B., Haba, J., Hayasaka, K., Hirose, S., Hou, W. -S., Iijima, T., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Jaegle, I., Jeon, H. B., Jia, S., Jin, Y., Joo, K. K., 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., 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., Li Gioi, L., Libby, J., Liventsev, D., Luo, T., Matvienko, D., Merola, M., Miyata, H., Mizuk, R., Moon, H. K., Mori, T., Mussa, R., Nakano, E., Nanut, T., Nath, K. J., Natkaniec, Z., Nayak, M., Nisar, N. K., Nishida, S., Nishimura, K., Ogawa, K., Okuno, S., Ono, H., Pakhlov, P., Pakhlova, G., Pal, B., Pardi, S., Park, H., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Popov, V., Prencipe, E., Rostomyan, A., Russo, G., Sakai, Y., Salehi, M., Sandilya, S., Santelj, L., Sanuki, T., Savinov, V., Schneider, O., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Seon, O., Sevior, M. E., Shibata, T. -A., Shiu, J. -G., Solovieva, E., Starič, M., Strube, J. F., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Uno, S., Usov, Y., Van Hulse, C., Van Tonder, R., Varner, G., Varvell, K. E., Vorobyev, V., Waheed, E., Wang, B., Wang, C. H., Wang, M. -Z., Wang, P., Wang, X. L., Watanuki, S., Widmann, E., Won, E., Ye, H., Yelton, J., Yin, J. H., Yuan, C. Z., Yusa, Y., Zhang, Z. P., Zhilich, V., Zhukova, V., and Zhulanov, V. Evidence of a structure in $$\bar{K}^{0} \Lambda _{c}^{+}$$K¯0Λc+ consistent with a charged $$\Xi _c(2930)^{+}$$Ξc(2930)+, and updated measurement of $$\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$B¯0→K¯0Λc+Λ¯c- at Belle. United States: N. p., 2018. Web. doi:10.1140/epjc/s10052-018-6425-5.
Li, Y. B., Shen, C. P., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Aushev, T., Ayad, R., Babu, V., Badhrees, I., Bahinipati, S., Ban, Y., Bansal, V., Behera, P., Beleño, C., Bhardwaj, V., Bhuyan, B., Biswal, J., Bobrov, A., Bozek, A., Bračko, M., Browder, T. E., Cao, L., Červenkov, D., Chang, P., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Choi, S. -K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Dash, N., Di Carlo, S., Dingfelder, J., Doležal, Z., Dong, T. V., Drásal, Z., Eidelman, S., Epifanov, D., Fast, J. E., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Gelb, M., Giri, A., Goldenzweig, P., Golob, B., Haba, J., Hayasaka, K., Hirose, S., Hou, W. -S., Iijima, T., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Jaegle, I., Jeon, H. B., Jia, S., Jin, Y., Joo, K. K., 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., 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., Li Gioi, L., Libby, J., Liventsev, D., Luo, T., Matvienko, D., Merola, M., Miyata, H., Mizuk, R., Moon, H. K., Mori, T., Mussa, R., Nakano, E., Nanut, T., Nath, K. J., Natkaniec, Z., Nayak, M., Nisar, N. K., Nishida, S., Nishimura, K., Ogawa, K., Okuno, S., Ono, H., Pakhlov, P., Pakhlova, G., Pal, B., Pardi, S., Park, H., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Popov, V., Prencipe, E., Rostomyan, A., Russo, G., Sakai, Y., Salehi, M., Sandilya, S., Santelj, L., Sanuki, T., Savinov, V., Schneider, O., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Seon, O., Sevior, M. E., Shibata, T. -A., Shiu, J. -G., Solovieva, E., Starič, M., Strube, J. F., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Uno, S., Usov, Y., Van Hulse, C., Van Tonder, R., Varner, G., Varvell, K. E., Vorobyev, V., Waheed, E., Wang, B., Wang, C. H., Wang, M. -Z., Wang, P., Wang, X. L., Watanuki, S., Widmann, E., Won, E., Ye, H., Yelton, J., Yin, J. H., Yuan, C. Z., Yusa, Y., Zhang, Z. P., Zhilich, V., Zhukova, V., & Zhulanov, V. Evidence of a structure in $$\bar{K}^{0} \Lambda _{c}^{+}$$K¯0Λc+ consistent with a charged $$\Xi _c(2930)^{+}$$Ξc(2930)+, and updated measurement of $$\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$B¯0→K¯0Λc+Λ¯c- at Belle. United States. doi:10.1140/epjc/s10052-018-6425-5.
Li, Y. B., Shen, C. P., Adachi, I., Aihara, H., Al Said, S., Asner, D. M., Aushev, T., Ayad, R., Babu, V., Badhrees, I., Bahinipati, S., Ban, Y., Bansal, V., Behera, P., Beleño, C., Bhardwaj, V., Bhuyan, B., Biswal, J., Bobrov, A., Bozek, A., Bračko, M., Browder, T. E., Cao, L., Červenkov, D., Chang, P., Chekelian, V., Chen, A., Cheon, B. G., Chilikin, K., Cho, K., Choi, S. -K., Choi, Y., Choudhury, S., Cinabro, D., Cunliffe, S., Dash, N., Di Carlo, S., Dingfelder, J., Doležal, Z., Dong, T. V., Drásal, Z., Eidelman, S., Epifanov, D., Fast, J. E., Fulsom, B. G., Garg, R., Gaur, V., Gabyshev, N., Garmash, A., Gelb, M., Giri, A., Goldenzweig, P., Golob, B., Haba, J., Hayasaka, K., Hirose, S., Hou, W. -S., Iijima, T., Inami, K., Inguglia, G., Ishikawa, A., Itoh, R., Iwasaki, M., Iwasaki, Y., Jacobs, W. W., Jaegle, I., Jeon, H. B., Jia, S., Jin, Y., Joo, K. K., 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., 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., Li Gioi, L., Libby, J., Liventsev, D., Luo, T., Matvienko, D., Merola, M., Miyata, H., Mizuk, R., Moon, H. K., Mori, T., Mussa, R., Nakano, E., Nanut, T., Nath, K. J., Natkaniec, Z., Nayak, M., Nisar, N. K., Nishida, S., Nishimura, K., Ogawa, K., Okuno, S., Ono, H., Pakhlov, P., Pakhlova, G., Pal, B., Pardi, S., Park, H., Paul, S., Pedlar, T. K., Pestotnik, R., Piilonen, L. E., Popov, V., Prencipe, E., Rostomyan, A., Russo, G., Sakai, Y., Salehi, M., Sandilya, S., Santelj, L., Sanuki, T., Savinov, V., Schneider, O., Schnell, G., Schwanda, C., Seino, Y., Senyo, K., Seon, O., Sevior, M. E., Shibata, T. -A., Shiu, J. -G., Solovieva, E., Starič, M., Strube, J. F., Sumihama, M., Sumiyoshi, T., Takizawa, M., Tamponi, U., Tanida, K., Tenchini, F., Uchida, M., Uglov, T., Unno, Y., Uno, S., Usov, Y., Van Hulse, C., Van Tonder, R., Varner, G., Varvell, K. E., Vorobyev, V., Waheed, E., Wang, B., Wang, C. H., Wang, M. -Z., Wang, P., Wang, X. L., Watanuki, S., Widmann, E., Won, E., Ye, H., Yelton, J., Yin, J. H., Yuan, C. Z., Yusa, Y., Zhang, Z. P., Zhilich, V., Zhukova, V., and Zhulanov, V. Tue . "Evidence of a structure in $$\bar{K}^{0} \Lambda _{c}^{+}$$K¯0Λc+ consistent with a charged $$\Xi _c(2930)^{+}$$Ξc(2930)+, and updated measurement of $$\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$B¯0→K¯0Λc+Λ¯c- at Belle". United States. doi:10.1140/epjc/s10052-018-6425-5. https://www.osti.gov/servlets/purl/1484169.
@article{osti_1484169,
title = {Evidence of a structure in $$\bar{K}^{0} \Lambda _{c}^{+}$$K¯0Λc+ consistent with a charged $$\Xi _c(2930)^{+}$$Ξc(2930)+, and updated measurement of $$\bar{B}^{0} \rightarrow \bar{K}^{0} \Lambda _{c}^{+} \bar{\Lambda }_{c}^{-}$$B¯0→K¯0Λc+Λ¯c- at Belle},
author = {Li, Y. B. and Shen, C. P. and Adachi, I. and Aihara, H. and Al Said, S. and Asner, D. M. and Aushev, T. and Ayad, R. and Babu, V. and Badhrees, I. and Bahinipati, S. and Ban, Y. and Bansal, V. and Behera, P. and Beleño, C. and Bhardwaj, V. and Bhuyan, B. and Biswal, J. and Bobrov, A. and Bozek, A. and Bračko, M. and Browder, T. E. and Cao, L. and Červenkov, D. and Chang, P. and Chekelian, V. and Chen, A. and Cheon, B. G. and Chilikin, K. and Cho, K. and Choi, S. -K. and Choi, Y. and Choudhury, S. and Cinabro, D. and Cunliffe, S. and Dash, N. and Di Carlo, S. and Dingfelder, J. and Doležal, Z. and Dong, T. V. and Drásal, Z. and Eidelman, S. and Epifanov, D. and Fast, J. E. and Fulsom, B. G. and Garg, R. and Gaur, V. and Gabyshev, N. and Garmash, A. and Gelb, M. and Giri, A. and Goldenzweig, P. and Golob, B. and Haba, J. and Hayasaka, K. and Hirose, S. and Hou, W. -S. and Iijima, T. and Inami, K. and Inguglia, G. and Ishikawa, A. and Itoh, R. and Iwasaki, M. and Iwasaki, Y. and Jacobs, W. W. and Jaegle, I. and Jeon, H. B. and Jia, S. and Jin, Y. and Joo, K. K. and Kaliyar, A. B. and Kang, K. H. and Kato, Y. and Kawasaki, T. and Kim, D. Y. and Kim, J. B. and Kim, S. H. and Kinoshita, K. and Kodyš, P. and Korpar, S. and Kotchetkov, D. and Križan, P. and Kroeger, R. and Krokovny, P. and Kuhr, T. and Kwon, Y. -J. and Lange, J. S. and Lee, I. S. and Lee, S. C. and Li, L. K. and Li Gioi, L. and Libby, J. and Liventsev, D. and Luo, T. and Matvienko, D. and Merola, M. and Miyata, H. and Mizuk, R. and Moon, H. K. and Mori, T. and Mussa, R. and Nakano, E. and Nanut, T. and Nath, K. J. and Natkaniec, Z. and Nayak, M. and Nisar, N. K. and Nishida, S. and Nishimura, K. and Ogawa, K. and Okuno, S. and Ono, H. and Pakhlov, P. and Pakhlova, G. and Pal, B. and Pardi, S. and Park, H. and Paul, S. and Pedlar, T. K. and Pestotnik, R. and Piilonen, L. E. and Popov, V. and Prencipe, E. and Rostomyan, A. and Russo, G. and Sakai, Y. and Salehi, M. and Sandilya, S. and Santelj, L. and Sanuki, T. and Savinov, V. and Schneider, O. and Schnell, G. and Schwanda, C. and Seino, Y. and Senyo, K. and Seon, O. and Sevior, M. E. and Shibata, T. -A. and Shiu, J. -G. and Solovieva, E. and Starič, M. and Strube, J. F. and Sumihama, M. and Sumiyoshi, T. and Takizawa, M. and Tamponi, U. and Tanida, K. and Tenchini, F. and Uchida, M. and Uglov, T. and Unno, Y. and Uno, S. and Usov, Y. and Van Hulse, C. and Van Tonder, R. and Varner, G. and Varvell, K. E. and Vorobyev, V. and Waheed, E. and Wang, B. and Wang, C. H. and Wang, M. -Z. and Wang, P. and Wang, X. L. and Watanuki, S. and Widmann, E. and Won, E. and Ye, H. and Yelton, J. and Yin, J. H. and Yuan, C. Z. and Yusa, Y. and Zhang, Z. P. and Zhilich, V. and Zhukova, V. and Zhulanov, V.},
abstractNote = {We report evidence for the charged charmed-strange baryon Ξc(2930)+ with a signal significance of 3.9 σ with systematic errors included. The charged Ξc(2930)+ is found in its decay to K$0\atop{S}$Λ$+\atop{c}$ in the substructure of $\bar{B}$0→K$0\atop{S}$Λ$+\atop{c}$ $\bar{Λ}$ $\bar{c}$ decays. The measured mass and width are [2942.3±4.4(stat.)±1.5(syst.)] MeV/c2 and [14.8±8.8(stat.)±2.5(syst.)] MeV, respectively, and the product branching fraction is B($\bar{B^0}$→Ξc(2930)+$\bar{Λ}$ $\bar{c}$)B(Ξc(2930)+→$\bar{K}^0$Λ$+\atop{c}$)=[2.37±0.51(stat.)±0.31(syst.)]×10-4. We also measure B($\bar{B^0}$→$\bar{K}^0$Λ$+\atop{c}$ $$\bar{Λ}$ $-\atop{c}$)=[3.99±0.76(stat.)±0.51(syst.)]×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,Yη, in the Λ$+\atop{c}$ $\bar{Λ}$ $-\atop{c}$ invariant mass spectrum. No clear signals of the Y(4660) or Yη 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±11)×106$B\bar{B}$ pairs collected at the Υ(4S) resonance by the Belle detector at the KEKB asymmetric energy electron-positron collider.},
doi = {10.1140/epjc/s10052-018-6425-5},
journal = {European Physical Journal. C, Particles and Fields},
number = 11,
volume = 78,
place = {United States},
year = {Tue Nov 13 00:00:00 EST 2018},
month = {Tue Nov 13 00:00:00 EST 2018}
}

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