School of Physics - Research Publications

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    Measurement of the ZZ Production Cross Section and Limits on Anomalous Neutral Triple Gauge Couplings in Proton-Proton Collisions at root s=7 TeV with the ATLAS Detector
    Aad, G ; Barberio, Luigia ; DAVIDSON, NADIA ; KUBOTA, TAKASHI ; LIMOSANI, ANTONIO ; MOORHEAD, GARETH ; Nunes Hanninger, Guilherme ; PHAN, ANNA ; SEVIOR, MARTIN ; Shao, Qi Tao ; TAYLOR, GEOFFREY ; VOLPI, MATTEO ; WHITE, MARTIN ; Zwalinski, L ( 2012)
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    Observation of psi(4040) and psi(4160) decay into eta J/psi
    Wang, XL ; Han, YL ; Yuan, CZ ; Shen, CP ; Wang, P ; Adachi, I ; Aihara, H ; Asner, DM ; Aulchenko, V ; Aushev, T ; Aziz, T ; Bakich, AM ; Ban, Y ; Bhuyan, B ; Bonvicini, G ; Bozek, A ; Bracko, M ; Brodzicka, J ; Brovchenko, O ; Browder, TE ; Chen, P ; Cheon, BG ; Cho, K ; Choi, S-K ; Choi, Y ; Dalseno, J ; Dolezal, Z ; Drasal, Z ; Eidelman, S ; Esen, S ; Farhat, H ; Fast, JE ; Gaur, V ; Gillard, R ; Goh, YM ; Golob, B ; Hayashii, H ; Hoshi, Y ; Hou, W-S ; Hyun, HJ ; Inami, K ; Ishikawa, A ; Iwabuchi, M ; Kang, JH ; Kapusta, P ; Kim, HJ ; Kim, HO ; Kim, JB ; Kim, JH ; Kim, MJ ; Kim, YJ ; Kinoshita, K ; Klucar, J ; Ko, BR ; Kodys, P ; Kouzes, RT ; Krizan, P ; Krokovny, P ; Kumita, T ; Lange, JS ; Lee, S-H ; Li, J ; Libby, J ; Liu, C ; Liu, ZQ ; Lukin, P ; McOnie, S ; Miyata, H ; Mizuk, R ; Mohanty, GB ; Moll, A ; Muramatsu, N ; Mussa, R ; Nakao, M ; Nishida, S ; Nitoh, O ; Ogawa, S ; Ohshima, T ; Okuno, S ; Olsen, SL ; Pakhlova, G ; Park, H ; Pedlar, TK ; Pestotnik, R ; Petric, M ; Piilonen, LE ; Prothmann, K ; Sahoo, H ; Sakai, Y ; Sandilya, S ; Santel, D ; Sanuki, T ; Schneider, O ; Schwanda, C ; Senyo, K ; Sevior, ME ; Shapkin, M ; Shibata, T-A ; Shiu, J-G ; Sibidanov, A ; Simon, F ; Smerkol, P ; Sohn, Y-S ; Solovieva, E ; Stanic, S ; Staric, M ; Sumiyoshi, T ; Tanida, K ; Tatishvili, G ; Teramoto, Y ; Trabelsi, K ; Uchida, M ; Uehara, S ; Unno, Y ; Uno, S ; Usov, Y ; Vanhoefer, P ; Varner, G ; Wang, CH ; Wang, J ; Wang, M-Z ; Williams, KM ; Won, E ; Yamashita, Y ; Zhang, CC ; Zhang, ZP ; Zhilich, V ; Zupanc, A (AMER PHYSICAL SOC, 2013-03-20)
    The cross section for e^+e^- \to \eta J/\psi between \sqrt{s}=3.8 GeV/c^2 and 5.3 GeV/c^2 is measured via initial state radiation using 980 fb^{-1} of data on and around the \Upsilon(nS)(n=1,2,3,4,5) resonances collected with the Belle detector at KEKB. Two resonant structures at the \psi(4040) and \psi(4160) are observed in the \eta J/\psi invariant mass distribution. Fitting the mass spectrum with the coherent sum of two Breit-Wigner functions, one obtains BR(\psi(4040)\to\eta J/\psi)\cdot\Gamma_{ee}^{\psi(4040)} = (4.8\pm0.9\pm1.4) eV and BR(\psi(4160)\to\eta J/\psi)\cdot\Gamma_{ee}^{\psi(4160)} = (4.0\pm0.8\pm1.4) eV for one solution and BR(\psi(4040)\to\eta J/\psi)\cdot\Gamma_{ee}^{\psi(4040)} = (11.2\pm1.3\pm1.9) eV and BR(\psi(4160)\to\eta J/\psi)\cdot\Gamma_{ee}^{\psi(4160)} = (13.8\pm1.3\pm2.0) eV for the other solution, where the first errors are statistical and the second are systematic. This is the first measurement of this hadronic transition mode of these two states, and the partial widths to \eta J/\psi are found to be about 1 MeV. There is no evidence for the Y(4260), Y(4360), \psi(4415), or Y(4660) in the \eta J/\psi final state, and upper limits of their production rates in e^+e^- annihilation are determined.