Abstract

We present the first measurements of absolute branching fractions of $${\mathrm{{\Xi}}}_{c}^{0}$$ decays into $${\mathrm{{\Xi}}}^{{-}}{{\pi}}^{+}$$, $$\mathrm{{\Lambda}}{K}^{{-}}{{\pi}}^{+}$$, and $$p{K}^{{-}}{K}^{{-}}{{\pi}}^{+}$$ final states. The measurements are made using a dataset comprising $$(772\pm{}11)\times{}{10}^{6}$$ $$B\overline{B}$$ pairs collected at the $$\mathrm{{\Upsilon}}(4S)$$ resonance with the Belle detector at the KEKB $${e}^{+}{e}^{{-}}$$ collider. We first measure the absolute branching fraction for $${B}^{{-}}{\rightarrow}{\overline{\mathrm{{\Lambda}}}}_{c}^{{-}}{\mathrm{{\Xi}}}_{c}^{0}$$ using a missing-mass technique; the result is $$\mathcal{B}({B}^{{-}}{\rightarrow}{\overline{\mathrm{{\Lambda}}}}_{c}^{{-}}{\mathrm{{\Xi}}}_{c}^{0})=(9.51\pm{}2.10\pm{}0.88)\times{}{10}^{{-}4}$$. We subsequently measure the product branching fractions $$\mathcal{B}({B}^{{-}}{\rightarrow}{\overline{\mathrm{{\Lambda}}}}_{c}^{{-}}{\mathrm{{\Xi}}}_{c}^{0})\mathcal{B}({\mathrm{{\Xi}}}_{c}^{0}{\rightarrow}{\mathrm{{\Xi}}}^{{-}}{{\pi}}^{+})$$, $$\mathcal{B}({B}^{{-}}{\rightarrow}{\overline{\mathrm{{\Lambda}}}}_{c}^{{-}}{\mathrm{{\Xi}}}_{c}^{0})\mathcal{B}({\mathrm{{\Xi}}}_{c}^{0}{\rightarrow}\mathrm{{\Lambda}}{K}^{{-}}{{\pi}}^{+})$$, and $$\mathcal{B}({B}^{{-}}{\rightarrow}{\overline{\mathrm{{\Lambda}}}}_{c}^{{-}}{\mathrm{{\Xi}}}_{c}^{0})\mathcal{B}({\mathrm{{\Xi}}}_{c}^{0}{\rightarrow}p{K}^{{-}}{K}^{{-}}{{\pi}}^{+})$$ with improved precision. Dividing these product branching fractions by the result for $${B}^{{-}}{\rightarrow}{\overline{\mathrm{{\Lambda}}}}_{c}^{{-}}{\mathrm{{\Xi}}}_{c}^{0}$$ yields the following branching fractions: $$\mathcal{B}({\mathrm{{\Xi}}}_{c}^{0}{\rightarrow}{\mathrm{{\Xi}}}^{{-}}{{\pi}}^{+})=(1.80\pm{}0.50\pm{}0.14)%$$, $$\mathcal{B}({\mathrm{{\Xi}}}_{c}^{0}{\rightarrow}\mathrm{{\Lambda}}{K}^{{-}}{{\pi}}^{+})=(1.17\pm{}0.37\pm{}0.09)%$$, and $$\mathcal{B}({\mathrm{{\Xi}}}_{c}^{0}{\rightarrow}p{K}^{{-}}{K}^{{-}}{{\pi}}^{+})=(0.58\pm{}0.23\pm{}0.05)%$$. For the above branching fractions, the first uncertainties are statistical and the second are systematic. Our result for $$\mathcal{B}({\mathrm{{\Xi}}}_{c}^{0}{\rightarrow}{\mathrm{{\Xi}}}^{{-}}{{\pi}}^{+})$$ can be combined with $${\mathrm{{\Xi}}}_{c}^{0}$$ branching fractions measured relative to $${\mathrm{{\Xi}}}_{c}^{0}{\rightarrow}{\mathrm{{\Xi}}}^{{-}}{{\pi}}^{+}$$ to yield other absolute $${\mathrm{{\Xi}}}_{c}^{0}$$ branching fractions.

Authors:

Li, Y. B.; Shen, C. P.; Yuan, C. Z.; Adachi, I.; Aihara, H.; Al Said, S.; Asner, D. M.; Aushev, T.; Ayad, R.; Badhrees, I.; Ban, Y.; Bansal, V.; Beleño, C.; Berger, M.; Bhardwaj, V.; Bhuyan, B.; Bilka, T.; Biswal, J.; Bondar, A.; Bozek, A. more »; Bračko, M.; Cao, L.; Červenkov, D.; Chen, A.; Cheon, B. G.; Chilikin, K.; Cho, K.; Choi, S. -K.; Choi, Y.; Cinabro, D.; Cunliffe, S.; Di Carlo, S.; Doležal, Z.; Dong, T. V.; Drásal, Z.; Eidelman, S.; Fast, J. E.; Fulsom, B. G.; Garg, R.; Gaur, V.; Gabyshev, N.; Garmash, A.; Giri, A.; Goldenzweig, P.; Greenwald, D.; Grube, B.; Hayasaka, K.; Hayashii, H.; Hsu, C. -L.; Iijima, T.; Inami, K.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Jacobs, W. W.; Jia, S.; Jin, Y.; Joffe, D.; 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.; Kodyš, P.; Korpar, S.; Kotchetkov, D.; Križan, P.; Kroeger, R.; Krokovny, P.; Kumita, T.; Kuzmin, A.; Kwon, Y. -J.; Lee, J. Y.; Lee, S. C.; Li, L. K.; Li Gioi, L.; Libby, J.; Liventsev, D.; Lubej, M.; MacNaughton, J.; Masuda, M.; Matsuda, T.; Merola, M.; Miyabayashi, K.; Miyata, H.; Mizuk, R.; Mohanty, G. B.; Mussa, R.; Nakano, E.; Nakao, M.; Nath, K. J.; Nayak, M.; Niiyama, M.; Nishida, S.; Ono, H.; Onuki, Y.; Pakhlov, P.; Pakhlova, G.; Pal, B.; Pardi, S.; Park, S. -H.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Popov, V.; Prencipe, E.; Russo, G.; Sakai, Y.; Salehi, M.; Sandilya, S.; Santelj, L.; Sanuki, T.; Savinov, V.; Schneider, O.; Schnell, G.; Schueler, J.; Schwanda, C.; Schwartz, A. J.; Seino, Y.; Senyo, K.; Sevior, M. E.; Shibata, T. -A.; Shiu, J. -G.; Shwartz, B.; Solovieva, E.; Starič, M.; Sumihama, M.; Sumiyoshi, T.; Sutcliffe, W.; Takizawa, M.; Tanida, K.; Tao, Y.; Tenchini, F.; Trabelsi, K.; Uchida, M.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Van Tonder, R.; Varner, G.; Wang, 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.; Zhang, Z. P.; Zhilich, V.; Zhukova, V. « less

Publication Date:

2019-02-25

Research Org.:

Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:

USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Org.:

Belle Collaboration

OSTI Identifier:

1496509

Alternate Identifier(s):

OSTI ID: 1501557

Report Number(s):

BNL-211390-2019-JAAM
Journal ID: ISSN 0031-9007

Grant/Contract Number:  

SC0012704

Resource Type:

Published Article

Journal Name:

Physical Review Letters

Additional Journal Information:

Journal Volume: 122; Journal Issue: 8; Journal ID: ISSN 0031-9007

Publisher:

American Physical Society (APS)

Country of Publication:

United States

Language:

English

Subject:

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; branching fraction; hadronic decays