First Measurements of Absolute Branching Fractions of the Xi(0)(c) Baryon at Belle

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. ; Beleno, C. ; Berger, M. ; Bhardwaj, V. ; Bhuyan, B. ; Bilka, T. ; Biswal, J. ; Bondar, A. ; Bozek, A. ; Bracko, M. ; Cao, L. ; Cervenkov, D. ; Chen, A. ; Cheon, B. G. ; Chilikin, K. ; Cho, K. ; Choi, S. -K. ; Choi, Y. ; Cinabro, D. ; Cunliffe, S. ; Di Carlo, S. ; Dolezal, Z. ; Dong, T. V. ; Drasal, 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. ; Kodys, P. ; Korpar, S. ; Kotchetkov, D. ; Krizan, 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. ; Staric, 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.

We present the first measurements of absolute branching fractions of Xi(0)(c) decays into Xi(-)pi(+), Lambda K-pi(+), and pK(-)K(-)pi(+) final states. The measurements are made using a dataset comprising (772 +/- 11) x 10(6) B (B) over bar pairs collected at the (sic)(4S) resonance with the Belle detector at the KEKB e(+)e(-)collider. We first measure the absolute branching fraction for B- -> (Lambda) over bar (-)(c)Xi(0)(c) using a missing-mass technique; the result is B(B- -> (Lambda) over bar (-)(c)Xi(0)(c)) = (9.51 +/- 2.10 +/- 0.88) x 10(-4). We subsequently measure the product branching fractions B(B- -> (Lambda) over bar (-)(c)Xi(0)(c))B(Xi(0)(c) -> Xi(-)pi(+)), B(B- -> (Lambda) over bar (-)(c)Xi(0)(c))B(Xi(0)(c) -> Lambda K-pi(+)), and B(B- -> (Lambda) over bar (-)(c)Xi(0)(c))B(Xi(0)(c) -> pK(-)K(-)pi(+)) with improved precision. Dividing these product branching fractions by the result for B- -> (Lambda) over bar (-)(c)Xi(0)(c) yields the following branching fractions: B(Xi(0)(c) -> Xi(-)pi(+)) = (1.80 +/- 0.50 +/- 0.14)%, B(Xi(0)(c) -> Lambda K-pi(+)) = (1.17 +/- 0.37 +/- 0.09)%, and B(Xi(0)(c) -> pK(-)K(-)pi(+) ) = 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(Xi(0)(c) -> Xi(-)pi(+)) can be combined with Xi(0)(c) branching fractions measured relative to Xi(0)(c) -> Xi(-)pi(+) to yield other absolute Xi(0)(c) branching fractions.


Published in:
Physical Review Letters, 122, 8, 082001
Year:
Feb 25 2019
ISSN:
0031-9007
1079-7114
Keywords:
Laboratories:




 Record created 2019-06-18, last modified 2019-12-05

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