Search for charmonium and charmoniumlike states in radiative decays

X. L. Wang, C. P. Shen, C. Z. Yuan, P. Wang, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, A. M. Bakich, E. Barberio, K. Belous, B. Bhuyan, A. Bozek, M. Bračko, T. E. Browder, M. C. Chang, A. Chen, B. G. Cheon, K. Chilikin, I. S. ChoK. Cho, Y. Choi, J. Dalseno, M. Danilov, Z. Doleal, S. Eidelman, J. E. Fast, M. Feindt, V. Gaur, Y. M. Goh, J. Haba, K. Hayasaka, H. Hayashii, Y. Hoshi, Y. B. Hsiung, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Iwashita, T. Julius, J. H. Kang, N. Katayama, T. Kawasaki, H. Kichimi, H. J. Kim, H. O. Kim, J. B. Kim, J. H. Kim, K. T. Kim, M. J. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, N. Kobayashi, S. Koblitz, P. Krian, A. Kuzmin, Y. J. Kwon, J. S. Lange, S. H. Lee, J. Li, X. R. Li, Y. Li, J. Libby, C. L. Lim, C. Liu, D. Liventsev, R. Louvot, D. Matvienko, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, R. Mussa, Y. Nagasaka, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Neubauer, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, Y. Onuki, P. Pakhlov, G. Pakhlova, H. Park, H. K. Park, T. K. Pedlar, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Ritter, S. Ryu, H. Sahoo, Y. Sakai, T. Sanuki, O. Schneider, C. Schwanda, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, T. A. Shibata, J. G. Shiu, B. Shwartz, F. Simon, P. Smerkol, Y. S. Sohn, E. Solovieva, S. Stanič, M. Starič, M. Sumihama, G. Tatishvili, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, Y. Unno, S. Uno, Y. Usov, G. Varner, C. H. Wang, M. Z. Wang, Y. Watanabe, Eunil Won, B. D. Yabsley, Y. Yamashita, M. Yamauchi, Z. P. Zhang, V. Zhilich

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Abstract

Using a sample of 158×106 Υ(2S) events collected with the Belle detector, charmonium and charmoniumlike states with even charge parity are searched for in Υ(2S) radiative decays. No significant χ<inf>cJ</inf> or η<inf>c</inf> signal is observed, and the following upper limits at 90% confidence level (C. L.) are obtained: B(Υ(2S) →γχ<inf>c0</inf>)<1.0×10<sup>-</sup>4, B(Υ(2S)→γχ<inf>c1</inf>)<3.6×10<sup>-</sup>6, B(Υ(2S)→γχ<inf>c2</inf>)<1.5×10<sup>-</sup>5, and B(Υ(2S)→γη<inf>c</inf>)<2.7×10<sup>-</sup>5. No significant signal of any charmoniumlike state is observed, and we obtain the limits B(Υ(2S)→γX(3872))×B(X(3872)→π <sup>+</sup>π<sup>-</sup>J/ψ)<0.8×10<sup>-</sup>6, B(Υ(2S)→γX(3872))×B(X(3872)→π<sup>+</sup>π <sup>-</sup>π0J/ψ)<2.4×10<sup>-</sup>6, B(Υ(2S) →γX(3915))×B(X(3915)→ωJ/ψ)<2.8×10 <sup>-</sup>6, B(Υ(2S)→γY(4140))×B(Y(4140)→J/ψ)) <1.2×10<sup>-</sup>6, and B(Υ(2S)→γX(4350)) ×B(X(4350)→J/ψ))<1.3×10<sup>-</sup>6 at 90% C. L.

Original languageEnglish
Article number071107
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume84
Issue number7
DOIs
Publication statusPublished - 2011 Oct 28

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Wang, X. L., Shen, C. P., Yuan, C. Z., Wang, P., Adachi, I., Aihara, H., ... Zhilich, V. (2011). Search for charmonium and charmoniumlike states in radiative decays. Physical Review D - Particles, Fields, Gravitation and Cosmology, 84(7), [071107]. https://doi.org/10.1103/PhysRevD.84.071107