Observation of a charmoniumlike enhancement in the γγ→ ωJ/ψ Process

S. Uehara, T. Aushev, A. M. Bakich, K. Belous, V. Bhardwaj, M. Bischofberger, M. Bračko, T. E. Browder, P. Chang, A. Chen, P. Chen, B. G. Cheon, C. C. Chiang, I. S. Cho, S. K. Choi, Y. Choi, J. Dalseno, A. Drutskoy, S. Eidelman, D. EpifanovM. Feindt, N. Gabyshev, H. Ha, J. Haba, K. Hayasaka, H. Hayashii, Y. Hoshi, W. S. Hou, Y. B. Hsiung, H. J. Hyun, K. Inami, R. Itoh, M. Iwabuchi, M. Iwasaki, Y. Iwasaki, N. J. Joshi, J. H. Kang, T. Kawasaki, C. Kiesling, H. J. Kim, J. H. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, P. Kodyš, S. Korpar, P. Križan, P. Krokovny, T. Kumita, A. Kuzmin, Y. J. Kwon, S. H. Kyeong, J. S. Lange, M. J. Lee, S. H. Lee, J. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, R. Mussa, E. Nakano, M. Nakao, H. Nakazawa, Z. Natkaniec, S. Nishida, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, M. Röhrken, S. Ryu, H. Sahoo, Y. Sakai, O. Schneider, C. Schwanda, M. E. Sevior, M. Shapkin, C. P. Shen, J. G. Shiu, B. Shwartz, J. B. Singh, P. Smerkol, E. Solovieva, M. Starič, Y. Teramoto, K. Trabelsi, Y. Unno, S. Uno, P. Urquijo, G. Varner, K. Vervink, C. H. Wang, P. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, C. C. Zhang, T. Zivko, O. Zyukova

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Abstract

We report the results of a search for a charmoniumlike state produced in the process γγ→ωJ/ψ in the 3.9-4.2GeV/c2 mass region. We observe a significant enhancement, which is well described by a resonant shape with mass M=(3915±3±2)MeV/c2 and total width Γ=(17±10±3)MeV. This enhancement may be related to one or more of the three charmoniumlike states so far reported in the 3.90-3.95GeV/c2 mass region.

Original languageEnglish
Article number092001
JournalPhysical Review Letters
Volume104
Issue number9
DOIs
StatePublished - 5 Mar 2010

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