Search for charmonium and charmoniumlike states in ${\rm Y}\left(2S\right)$ radiative decays

Journal Article · Fri Oct 28 04:00:00 EDT 2011 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.84.071107· OSTI ID:1338238

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

Using a sample of 158 x 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 Xcl or nc signal is observed, and the following upper limits at 90% confidence level (C. L.) are obtained: Β(Υ(2S)→YXco)<1.0×10^-⁴, Β(Υ(2S)→yxc1)<3.6×10^-⁶, Β(Υ(2S)→yxc2)<1.5 x 10^-⁵, and Β(Υ(2S)→ync)<2.7×10^-⁵. No significant signal of any charmoniumlike state is observed, and we obtain the limits Β(Υ(2S)→yX(3872)) x Β(X(3872)→π⁺π⁻J/ψ)<0.8×10-6, Β(Υ(2S)→γX(3872))× Β(X(3872)→ π⁺π⁻π⁰Jlψ)<2.4 x 10⁻⁶, Β(Υ(2S)→γX(3915))× Β(X(3915)→ωJ/ψ)<2.8×10⁻⁶, Β(Υ(2S)→γY(4140)) x Β(Y(4140)→$$\phi$$J/ψ))<1.2 x 10^-⁶, and Β(Υ(2S)→yX(4350))× Β(X(4350)→$$\phi$$J/ψ))<1.3×10⁻⁶ at 90% C. L.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• Contributing Organization: Belle Collaboration
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1338238
• Report Number(s): PNNL-SA--87224; KA1202033
• Journal Information: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Journal Issue: 7 Vol. 84; ISSN PRVDAQ; ISSN 1550-7998
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS