Search for charmonium and charmoniumlike states in y (1S) radiative decays

C. P. Shen, X. L. Wang, C. Z. Yuan, P. Wang, I. Adachi, H. Aihara, T. Aushev, A. M. Bakich, V. Balagura, K. Belous, V. Bhardwaj, M. Bischofberger, M. Bračko, T. E. Browder, M. C. Chang, K. F. Chen, P. Chen, B. G. Cheon, Y. Choi, J. DalsenoM. Danilov, Z. Doleal, S. Eidelman, N. Gabyshev, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, K. Inami, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Julius, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, C. Kiesling, H. J. Kim, M. J. Kim, Y. J. Kim, B. R. Ko, P. Križlan, T. Kuhr, A. Kuzmin, J. S. Lange, M. J. Lee, S. H. Lee, R. Leitner, J. Li, C. Liu, R. Louvot, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, G. B. Mohanty, R. Mussa, E. Nakano, M. Nakao, Z. Natkaniec, S. Nishida, T. Ohshima, S. Okuno, S. L. Olsen, G. Pakhlova, C. W. Park, H. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Röhrken, S. Ryu, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, L. Shang, M. Shapkin, J. G. Shiu, B. Shwartz, P. Smerkol, E. Solovieva, S. Stanič, M. Starič, Y. Teramoto, T. Uglov, Y. Unno, S. Uno, G. Varner, K. Vervink, C. H. Wang, M. Z. Wang, R. Wedd, Eunil Won, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, P. Zhou, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

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Abstract

Using a sample of 102×106 Υ(1S) events collected with the Belle detector, we report on the first search for charge-parity-even charmonium and charmoniumlike states in Υ(1S) radiative decays. No significant χcJ or ηc signal is observed and 90% C.L. limits on B(Υ(1S)→γχc0)<6.5×10⊃-4, B(Υ(1S)→γχc1)<2.3×10⊃-5, B(Υ(1S)→γχc2)<7.6×10⊃-6, and B(Υ(1S)→γηc)<5.7×10⊃-5 are obtained. The product branching fraction limits B(Υ(1S)→γX(3872)) B(X(3872)→π⊃+π⊃-J/ψ)<1.6×10⊃-6, B(Υ(1S)→γX(3872))B(X(3872)→π⊃+π⊃-π0J/ ψ)<2.8×10⊃-6, B(Υ(1S)→γX(3915))B(X(3915) →ωJ/ψ)<3.0×10⊃-6, and B(Υ(1S) →γY(4140))B(Y(4140)→J/ψ)<2.2×10⊃-6 are obtained at the 90% C.L. Furthermore, no evidence is found for excited charmonium states below 4.8GeV/c2.

Original languageEnglish
Article number051504
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume82
Issue number5
DOIs
Publication statusPublished - 2010 Sep 22

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Shen, C. P., Wang, X. L., Yuan, C. Z., Wang, P., Adachi, I., Aihara, H., Aushev, T., Bakich, A. M., Balagura, V., Belous, K., Bhardwaj, V., Bischofberger, M., Bračko, M., Browder, T. E., Chang, M. C., Chen, K. F., Chen, P., Cheon, B. G., Choi, Y., ... Zyukova, O. (2010). Search for charmonium and charmoniumlike states in y (1S) radiative decays. Physical Review D - Particles, Fields, Gravitation and Cosmology, 82(5), [051504]. https://doi.org/10.1103/PhysRevD.82.051504