Measurement of $B^0 \to J/ψη^{(}{}'{}^{)}$ and Constraint on the $η-η'$ Mixing Angle
Creators: name: Chang, M. -C.
name: Duh, Y. -C.
name: Lin, J. -Y.
name: Adachi, I.
name: Adamczyk, K.
name: Aihara, H.
name: Asner, D. M.
name: Aushev, T.
name: Bakich, A. M.
name: Bhardwaj, V.
name: Bhuyan, B.
name: Bondar, A.
name: Bozek, A.
name: Bracko, M.
name: Brodzicka, J.
name: Browder, T. E.
name: Chang, P.
name: Chen, A.
name: Chen, K. -F.
name: Chen, P.
name: Cheon, B. G.
name: Chilikin, K.
name: Chistov, R.
name: Cho, I. -S.
name: Choi, S. -K.
name: Choi, Y.
name: Dalseno, J.
name: Dolezal, Z.
name: Drasal, Z.
name: Drutskoy, A.
name: Eidelman, S.
name: Fast, J. E.
name: Gaur, V.
name: Garmash, A.
name: Goh, Y. M.
name: Golob, B.
name: Haba, J.
name: Hara, T.
name: Hayasaka, K.
name: Hayashii, H.
name: Horii, Y.
name: Hoshi, Y.
name: Hou, W. -S.
name: Hyun, H. J.
name: Iijima, T.
name: Ishikawa, A.
name: Itoh, R.
name: Iwabuchi, M.
name: Iwasaki, Y.
name: Iwashita, T.
name: Julius, T.
name: Katayama, N.
name: Kawasaki, T.
name: Kim, H. O.
name: Kim, J. B.
name: Kim, K. T.
name: Kim, M. J.
name: Kim, Y. J.
name: Kinoshita, K.
name: Ko, B. R.
name: Koblitz, S.
name: Kodys, P.
name: Korpar, S.
name: Krizan, P.
name: Krokovny, P.
name: Kuhr, T.
name: Kumar, R.
name: Kumita, T.
name: Kwon, Y. -J.
name: Lange, J. S.
name: Lee, S. -H.
name: Li, J.
name: Li, Y.
name: Libby, J.
name: Liu, C.
name: Liu, Z. Q.
name: Louvot, R.
name: McOnie, S.
name: Miyabayashi, K.
name: Miyata, H.
name: Miyazaki, Y.
name: Mizuk, R.
name: Mohanty, G. B.
name: Moll, A.
name: Muramatsu, N.
name: Nagasaka, Y.
name: Nakamura, I.
name: Nakano, E.
name: Nakao, M.
name: Nakazawa, H.
name: Natkaniec, Z.
name: Nishida, S.
name: Nishimura, K.
name: Nitoh, O.
name: Ogawa, S.
name: Ohshima, T.
name: Okuno, S.
name: Olsen, S. L.
name: Pakhlova, G.
name: Park, C. W.
name: Park, K. S.
name: Pedlar, T. K.
name: Peng, T.
name: Pestotnik, R.
name: Petric, M.
name: Piilonen, L. E.
name: Rohrken, M.
name: Ryu, S.
name: Sahoo, H.
name: Sakai, K.
name: Sakai, Y.
name: Schneider, O.
name: Schwanda, C.
name: Schwartz, A. J.
name: Senyo, K.
name: Sevior, M. E.
name: Shapkin, M.
name: Shen, C. P.
name: Shibata, T. -A.
name: Shiu, J. -G.
name: Sibidanov, A.
name: Simon, F.
name: Smerkol, P.
name: Sohn, Y. -S.
name: Sokolov, A.
name: Solovieva, E.
name: Stanic, S.
name: Staric, M.
name: Sumihama, M.
name: Sumiyoshi, T.
name: Tanaka, S.
name: Tatishvili, G.
name: Teramoto, Y.
name: Uchida, M.
name: Uehara, S.
name: Uglov, T.
name: Unno, Y.
name: Uno, S.
name: Urquijo, P.
name: Usov, Y.
name: Varner, G.
name: Vorobyev, V.
name: Wang, C. H.
name: Wang, M. -Z.
name: Wang, P.
name: Watanabe, Y.
name: Williams, K. M.
name: Won, E.
name: Yamamoto, H.
name: Yamashita, Y.
name: Yuan, C. Z.
name: Yusa, Y.
name: Zhang, Z. P.
name: Zhilich, V.
name: Zhulanov, V.
name: Zupanc, A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We measure the branching fractions of $B^{0} \to J/ψη^{(}{}'{}^{)}$ decays with the complete Belle data sample of $772 \times 10^{6}$ $B\bar{B}$ events collected at the $Υ(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. The results for the branching fractions are: ${\cal B}(B^{0} \to J/ψη)=(12.3 \pm ^{1.8}_{1.7} \pm 0.7) \times 10^{-6}$ and ${\cal B}(B^{0} \to J/ψη') &lt; 7.4 \times 10^{-6}$ at 90% confidence level. The $η-η'$ mixing angle is constrained to be less than $ 42.2^{\circ}$ at 90% confidence level.
description: 6 pages, 2 figures, 3 tables. submitted to PRD(RC)