Evidence of $\mathrm{\Upsilon }\left(1S\right)\to J/\psi +{\chi }_{c1}$ and search for double-charmonium production in $\mathrm{\Upsilon }\left(1S\right)$ and $\mathrm{\Upsilon }\left(2S\right)$ decays

Yang, S. D.; Behera, P.; Bračko, M.; Liventsev, D.; Petrič, M.; Yook, Y.; Chobanova, V.; Zhilich, V.; Uehara, S.; Al Said, S.; Hayasaka, K.; Tanida, K.; Lukin, P.; Uglov, T.; Vorobyev, V.; Choi, Y.; He, X. H.; Tatishvili, G.; Cheon, B. G.; Jaegle, I.; Park, H.; Sumiyoshi, T.; Okuno, S.; Kim, K. T.; Nakao, Mikihiko; Bobrov, A.; Cho, K.; Bakich, A. M.; Wang, P.; Golob, B.; Arinstein, K.; Iijima, T.; Ishikawa, A.; Itoh, Ryosuke; Browder, T. E.; Bozek, A.; Kim, D. Y.; Libby, J.; Rostomyan, Armine; Lange, Jens Sören; Inami, K.; Li, J.; Santelj, L.; Vanhoefer, P.; Hayashii, H.; Piilonen, L. E.; Watanabe, Y.; Yuan, C. Z.; Sakai, Y.; Haba, J.; Ko, B. R.; Huschle, M.; Kim, H. J.; Kuzmin, A.; Julius, T.; Aushev, T.; Goh, Y. M.; Drásal, Z.; Varner, G.; Wagner, M. N.; Won, E.; Schneider, O.; Ritter, M.; Farhat, H.; Aulchenko, V.; Shiu, J. -G.; Moll, A.; Kinoshita, K.; Uno, S.; Adachi, I.; Li, Y.; Yamaoka, J.; Dutta, K.; Miyata, H.; Abdesselam, A.; Kim, J. H.; Červenkov, D.; Pedlar, T. K.; Ganguly, S.; Chistov, R.; Asner, D. M.; Watanabe, M.; Yashchenko, Sergey; Tamponi, U.; Sohn, Y. -S.; Gillard, R.; Eidelman, S.; Vahsen, S. E.; Doležal, Z.; Zhulanov, V.; Mussa, R.; Ayad, R.; Schwanda, C.; Aihara, H.; Ban, Y.; Sanuki, T.; Shibata, T. -A.; Vinokurova, A.; Chen, A.; Kawasaki, T.; Kodys, Peter; Kwon, Y. -J.; Nisar, N. K.; Gabyshev, N.; Dalseno, J.; Drutskoy, A.; Krokovny, P.; Kim, J. B.; Chilikin, K.; Ostrowicz, Waclaw; Pestotnik, Rok; Ferber, Torben; Chekelian, Vladimir; Park, C. W.; Simon, F.; Senyo, K.; Bansal, V.; Semmler, D.; Shebalin, V.; Zhang, Z. P.; Teramoto, Y.; Gaur, V.; Korpar, Samo; Vossen, A.; Van Hulse, C.; Sibidanov, A.; Miyabayashi, K.; Bhuyan, B.; Choi, S. -K.; Krizan, Peter; Unno, Y.; Dingfelder, J.; Wang, X. L.; Schnell, G.; Danilov, M.; Sokolov, A.; Staric, Marko; Shen, C. P.; Hou, W. -S.; Wang, C. H.; Urquijo, P.; Wang, M. -Z.; Fast, J. E.; Joffe, D.; Cinabro, D.; Nakano, E.; Belle Collaboration; Nishida, S.; Sandilya, S.; Shwartz, B.; Nanut, T.; Hara, T.; Joo, K. K.; Ribežl, E.; Garmash, A.; Steder, Michael; Li Gioi, L.; Usov, Y.; Uchida, M.

doi:10.1103/PhysRevD.90.112008

Journal Article/Internal Report

PUBDB-2014-04711

Evidence of $\mathrm{\Upsilon }\left(1S\right)\to J/\psi +{\chi }_{c1}$ and search for double-charmonium production in $\mathrm{\Upsilon }\left(1S\right)$ and $\mathrm{\Upsilon }\left(2S\right)$ decays

Yang, S. D. ; Shen, C. P. ; Ban, Y. ; Abdesselam, A. ; Adachi, I. ; Aihara, H. ; Arinstein, K. ; Asner, D. M. ; Aulchenko, V. ; Aushev, T. ; Ayad, R. ; Bakich, A. M. ; Bansal, V. ; Behera, P. ; Bhuyan, B. ; Bozek, A. ; Bračko, M. ; Browder, T. E. ; Červenkov, D. ; Chekelian, V.Extern* ; Chen, A. ; Cheon, B. G. ; Chilikin, K. ; Chistov, R. ; Cho, K. ; Chobanova, V. ; Choi, S. -. ; Choi, Y. ; Cinabro, D. ; Dalseno, J. ; Dingfelder, J. ; Doležal, Z. ; Drásal, Z. ; Eidelman, S. ; Farhat, H. ; Fast, J. E. ; Ferber, T.DESY* ; Gabyshev, N. ; Ganguly, S. ; Garmash, A. ; Gillard, R. ; Goh, Y. M. ; Golob, B. ; Haba, J. ; Hara, T. ; Hayashii, H. ; He, X. H. ; Hou, W. -. ; Huschle, M. ; Iijima, T. ; Inami, K. ; Ishikawa, A. ; Itoh, R.Extern* ; Jaegle, I. ; Joffe, D. ; Joo, K. K. ; Julius, T. ; Kawasaki, T. ; Kim, D. Y. ; Kim, J. B. ; Kim, K. T. ; Kinoshita, K. ; Ko, B. R. ; Kodys, P.Extern* ; Korpar, S. ; Krizan, P. ; Krokovny, P. ; Kwon, Y. -. ; Lange, J. S.Extern* ; Libby, J. ; Liventsev, D. ; Lukin, P. ; Miyabayashi, K. ; Miyata, H. ; Moll, A. ; Mussa, R. ; Nakano, E. ; Nakao, M.Extern* ; Nanut, T. ; Nisar, N. K. ; Nishida, S. ; Okuno, S. ; Ostrowicz, W. ; Park, C. W. ; Park, H. ; Pedlar, T. K. ; Pestotnik, R. ; Petrič, M. ; Piilonen, L. E. ; Ribežl, E. ; Rostomyan, A.DESY* ; Sakai, Y. ; Sandilya, S. ; Santelj, L. ; Sanuki, T. ; Schneider, O. ; Schwanda, C. ; Semmler, D. ; Senyo, K. ; Shebalin, V. ; Shibata, T. -. ; Shiu, J. -. ; Shwartz, B. ; Sibidanov, A. ; Sohn, Y. -. ; Sokolov, A. ; Staric, M. ; Steder, M.DESY* ; Sumiyoshi, T. ; Tamponi, U. ; Tanida, K. ; Tatishvili, G. ; Teramoto, Y. ; Uchida, M. ; Uehara, S. ; Uglov, T. ; Unno, Y. ; Uno, S. ; Urquijo, P. ; Usov, Y. ; Vahsen, S. E. ; Van Hulse, C. ; Vanhoefer, P. ; Varner, G. ; Vinokurova, A. ; Vorobyev, V. ; Vossen, A. ; Wagner, M. N. ; Wang, C. H. ; Wang, M. -. ; Wang, P. ; Wang, X. L. ; Watanabe, M. ; Watanabe, Y. ; Won, E. ; Yamaoka, J. ; Yashchenko, S.DESY* ; Yook, Y. ; Yuan, C. Z. ; Zhang, Z. P. ; Zhilich, V. ; Zhulanov, V. ; Belle Collaboration (Collaboration author) ; Al Said, S. ; Bobrov, A. ; Danilov, M. ; Drutskoy, A. ; Dutta, K. ; Gaur, V. ; Hayasaka, K. ; Kim, H. J. ; Kim, J. H. ; Kuzmin, A. ; Li, J. ; Li, Y. ; Li Gioi, L. ; Ritter, M. ; Schnell, G. ; Simon, F.

2014
American Physical Society

Physical review / D 90(11), 112008 (2014) [10.1103/PhysRevD.90.112008]

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Please use a persistent id in citations: doi:10.1103/PhysRevD.90.112008

Report No.: Belle Preprint 2014-14; arXiv:1409.7644

Abstract: Using data samples of $102×{10}^{6}$ $\mathrm{\Upsilon }\left(1S\right)$ and $158×{10}^{6}$ $\mathrm{\Upsilon }\left(2S\right)$ events collected with the Belle detector, a first experimental search has been made for double-charmonium production in the exclusive decays $\mathrm{\Upsilon }\left(1S,2S\right)\to J/\psi \left({\psi }^{\prime }\right)+X$, where $X={\eta }_{c}$, ${\chi }_{cJ}\left(J=0,1,2\right)$, ${\eta }_{c}\left(2S\right)$, $X\left(3940\right)$, and $X\left(4160\right)$. No significant signal is observed in the spectra of the mass recoiling against the reconstructed $J/\psi $ or ${\psi }^{\prime }$ except for the evidence of ${\chi }_{c1}$ production with a significance of $4.6\sigma $ for $\mathrm{\Upsilon }\left(1S\right)\to J/\psi +{\chi }_{c1}$. The measured branching fraction $\mathcal{B}\left(\mathrm{\Upsilon }\left(1S\right)\to J/\psi +{\chi }_{c1}\right)$ is $\left[3.90±1.21\left(\text{stat}\right)±0.23\left(\text{syst}\right)\right]×{10}^{-6}$. The 90% C.L. upper limits on the branching fractions of the other modes having a significance of less than $3\sigma $ are determined. These results are consistent with theoretical calculations using the nonrelativistic QCD factorization approach.

Keyword(s): electron positron: annihilation ; BELLE ; KEK-B ; experimental results ; upsilon mesons: hadronic decay ; Upsilon(9460): branching ratio: measured ; Upsilon(9460): branching ratio: upper limit ; Upsilon(10020): branching ratio: upper limit ; X(3940) ; quantum chromodynamics: factorization ; quantum chromodynamics: nonrelativistic ; Upsilon(9460) --> J/psi(3100) chi/c1(3510) ; 10.52 GeV-cms