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| 題名: | Evidence of (1S) →j /ψ+χc1 and search for double-charmonium production in (1S) and (2S) decays |
| 作者: | 陳鎰鋒;Ban, Y.;Adachi, I.;Aihara, H.;Said, S. Al;Arinstein, K.;Asner, D. M.;Aushev, T.;Ayad, R.;Bakich, A. M.;Bansal, V.;Behera, P.;Bozek, A.;Bračko, M.;Červenkov, D.;Chekelian, V.;Chen, A.;Chistov, R.;Cho, K.;Choi, S.-K.;Choi, Y.;Cinabro, D.;Dingfelder, J.;Drásal, Z.;Dutta, K.;Eidelman, S.;Fast, J. E.;Ferber, T.;Gaur, V.;Gabyshev, N.;Ganguly, S.;Gillard, R.;Golob, B.;Hayashii, H.;He, X. H.;Huschle, M.;Iijima, T.;Inami, K.;Ishikawa, A.;Itoh, R.;Joo, K. K.;Kawasaki, T.;Kim, D. Y.;Kim, J. B.;Kim, K. T.;Ko, B. R.;Kodyš, P.;Korpar, S.;Križan, P.;Krokovny, P.;Kuzmin, A.;Lange, J. S.;Li, Y.;Gioi, L. Li;Libby, J.;Miyabayashi, K.;Miyata, H.;Moll, A.;Mussa, R.;Nakano, E.;Nanut, T.;Nishida, S.;Okuno, S.;Ostrowicz, W.;Park, H.;Pedlar, T. K.;Pestotnik, R.;Piilonen, L. E.;Ribežl, E.;Rostomyan, A.;Sakai, Y.;Sandilya, S.;Sanuki, T.;Schnell, G.;Semmler, D.;Shibata, T.-A.;Shwartz, B.;Sibidanov, A.;Simon, F.;Sohn, Y.-S.;Starič, M.;Sumiyoshi, T.;Tamponi, U.;Tatishvili, G.;Unno, Y.;Uno, S.;Usov, Y.;Hulse, C. Van;Vanhoefer, P.;Vorobyev, V.;Wagner, M. N.;Wang, C. H.;Wang, M.-Z.;Won, E.;Yamaoka, J.;Yashchenko, S.;Yook, Y.;Yuan, C. Z.;Zhang, Z. P.;Zhilich, V.;Zhulanov, V. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | ddc:530;info:eu-repo/classification/ddc/530;Physics |
| 日期: | 2014-12-16 |
| 上傳時間: | 2026-04-23 11:54:53 (UTC+8) |
| 出版者: | American Physical Society;American Physical Society (APS) |
| 摘要: | 摘要： Using data samples of 102 x 10(6) gamma(1S) and 158 x 10(6) gamma(2S) events collected with the Belle detector, a first experimental search has been made for double-charmonium production in the exclusive decays gamma(1S, 2S) --> J/psi(psi') + X, where X = eta(c).chi(cJ) (J = 0, 1, 2), eta(c)(2S), X(3940), and X(4160). No significant signal is observed in the spectra of the mass recoiling against the reconstructed J/psi or psi' except for the evidence of chi(c1) production with a significance of 4.6 sigma for gamma(1S) -> J/psi + chi(c1). The measured branching fraction B(gamma(1S) -> J/psi + chi(c1)) is [3.90 +/- 1.21 (stat) +/- 0.23(syst) x 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.
出版者： American Physical Society (APS)
出版日期： 2014-12-16
出處： Physical Review D, 2014-12, Vol.90 (11)
識別號： ISSN: 1550-7998
識別號： DOI: 10.1103/physrevd.90.112008 |
| 顯示於類別: | [物理學系] 期刊論文
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