Observation of two charged bottomoniumlike resonances in Y(5S) decays

Date Issued
20-03-2012
Author(s)
Bondar, A.
Garmash, A.
Mizuk, R.
Santel, D.
Kinoshita, K.
Adachi, I.
Aihara, H.
Arinstein, K.
Asner, D. M.
Aushev, T.
Aziz, T.
Bakich, A. M.
Barberio, E.
Belous, K.
Bhardwaj, V.
Bischofberger, M.
Bozek, A.
BraÄ ko, M.
Browder, T. E.
Chang, M. C.
Chang, P.
Chen, A.
Cheon, B. G.
Chilikin, K.
Chistov, R.
Cho, I. S.
Cho, K.
Choi, S. K.
Choi, Y.
Dalseno, J.
Danilov, M.
Doleal, Z.
Drutskoy, A.
Eidelman, S.
Epifanov, D.
Fast, J. E.
Gaur, V.
Gabyshev, N.
Goh, Y. M.
Golob, B.
Haba, J.
Hara, T.
Hayasaka, K.
Hoshi, Y.
Hyun, H. J.
Iijima, T.
Inami, K.
Ishikawa, A.
Iwabuchi, M.
Iwasaki, Y.
Iwashita, T.
Julius, T.
Kang, J. H.
Kawasaki, T.
Kichimi, H.
Kiesling, C.
Kim, J. B.
Kim, J. H.
Kim, K. T.
Kim, M. J.
Kim, Y. J.
Ko, B. R.
Kobayashi, N.
Koblitz, S.
Kody, P.
Korpar, S.
Krian, P.
Kuhr, T.
Kumar, R.
Kumita, T.
Kuzmin, A.
Lange, J. S.
Lee, S. H.
Li, J.
Li, Y.
Indian Institute of Technology, Madras
Liu, C.
Liu, Z. Q.
Liventsev, D.
Louvot, R.
Matvienko, D.
McOnie, S.
Miyata, H.
Miyazaki, Y.
Mohanty, G. B.
Moll, A.
Muramatsu, N.
Mussa, R.
Nakao, M.
Natkaniec, Z.
Neubauer, S.
Niiyama, M.
Nishida, S.
Nishimura, K.
Nitoh, O.
Nozaki, T.
Olsen, S. L.
Onuki, Y.
Pakhlov, P.
Pakhlova, G.
DOI
Abstract
We report the observation of two narrow structures in the mass spectra of the π ±Υ(nS) (n=1, 2, 3) and π ±h b(mP) (m=1, 2) pairs that are produced in association with a single charged pion in Υ(5S) decays. The measured masses and widths of the two structures averaged over the five final states are M 1=(10607.2±2.0)MeV/c2, Γ 1=(18.4±2.4) MeV, and M 2=(10652.2±1.5)MeV/c2, Γ 2=(11. 5±2.2)MeV. The results are obtained with a 121.4fb -1 data sample collected with the Belle detector in the vicinity of the Υ(5S) resonance at the KEKB asymmetric-energy e +e - collider. © 2012 American Physical Society.
Volume
108