1. Observation of e+e- ??+?-?0?bJ and search for Xb ?? (1S) at s =10.867GeV
- Author
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He, X.H., Shen, C.P., Yuan, C.Z., Ban, Y., Abdesselam, A., Adachi, I., Aihara, H., Asner, D.M., Aulchenko, V., Aushev, T., Ayad, R., Bahinipati, S., Bakich, A.M., Bansal, V., Bhuyan, B., Bondar, A., Bonvicini, G., Bozek, A., Bra?ko, M., Browder, T.E., ?ervenkov, D., Chang, P., Chekelian, V., Chen, A., Cheon, B.G., Chilikin, K., Chistov, R., Cho, K., Chobanova, V., Choi, S.-K., Choi, Y., Cinabro, D., Dalseno, J., Danilov, M., Dole�al, Z., Dr�sal, Z., Drutskoy, A., Eidelman, S., Farhat, H., Fast, J.E., Ferber, T., Gaur, V., Gabyshev, N., Ganguly, S., Garmash, A., Gillard, R., Glattauer, R., Goh, Y.M., Grzymkowska, O., Haba, J., Hayasaka, K., Hayashii, H., Hou, W.-S., Iijima, T., Ishikawa, A., Itoh, R., Iwasaki, Y., Jaegle, I., Joo, K.K., Julius, T., Kato, E., Kawasaki, T., Kim, D.Y., Kim, M.J., Kim, Y.J., Kinoshita, K., Ko, B.R., Kody�, P., Korpar, S., Kri�an, P., Krokovny, P., Kumita, T., Kuzmin, A., Kwon, Y.-J., Lange, J.S., Li, Y., Libby, J., Liventsev, D., Matvienko, D., Miyabayashi, K., Miyata, H., Mizuk, R., Mohanty, G.B., Moll, A., Mussa, R., Nakano, E., Nakao, M., Nakazawa, H., Nanut, T., Natkaniec, Z., Nedelkovska, E., Nisar, N.K., Nishida, S., Ogawa, S., Okuno, S., Pakhlov, P., Pakhlova, G., Park, H., Pedlar, T.K., Pestotnik, R., Petri?, M., Piilonen, L.E., Ritter, M., Rostomyan, A., Sakai, Y., Sandilya, S., Santelj, L., Sanuki, T., Sato, Y., Savinov, V., Schneider, O., Schnell, G., Schwanda, C., Semmler, D., Senyo, K., Sevior, M.E., Shebalin, V., Shibata, T.-A., Shiu, J.-G., Shwartz, B., Sibidanov, A., Simon, F., Sohn, Y.-S., Sokolov, A., Solovieva, E., Stari?, M., Steder, M., Sumisawa, K., Sumiyoshi, T., Tamponi, U., Tanida, K., Tatishvili, G., Teramoto, Y., Thorne, F., Trabelsi, K., Uchida, M., Uehara, S., Uglov, T., Unno, Y., Uno, S., Urquijo, P., Vahsen, S.E., Van Hulse, C., Vanhoefer, P., Varner, G., Vinokurova, A., Vorobyev, V., Wagner, M.N., Wang, C.H., Wang, M.-Z., Wang, P., Wang, X.L., Watanabe, M., Watanabe, Y., Wehle, S., Williams, K.M., Won, E., Yamaoka, J., Yashchenko, S., Yook, Y., Yusa, Y., Zhang, Z.P., Zhilich, V., Zhulanov, V., Zupanc, A.
- Abstract
The e+e-??+?-?0?bJ (J=0,1,2) processes are studied using a 118fb-1 data sample acquired with the Belle detector at a center-of-mass energy of 10.867 GeV. Unambiguous ?+?-?0?bJ (J=1,2), ??b1 signals are observed, and indication for ??b2 is seen, both for the first time, and the corresponding cross section measurements are presented. No significant ?+?-?0?b0 or ??b0 signals are observed, and 90% confidence level upper limits on the cross sections for these two processes are obtained. In the ?+?-?0 invariant mass spectrum, significant non-? signals are also observed. We search for the X(3872)-like state (named Xb) decaying into ??(1S); no significant signal is observed with a mass between 10.55 and 10.65GeV/c2. � 2014 American Physical Society.
- Published
- 2014