Measurement of Χc2 production in two-photon collisions

K. Abe, K. Abe, R. Abe, T. Abe, I. Adachi, B. S. Ahn, H. Aihara, M. Akatsu, Y. Asano, T. Aso, V. Aulchenko, T. Aushev, A. M. Bakich, Y. Ban, E. Banas, A. Bay, P. K. Behera, A. Bondar, A. Bozek, M. BračkoJ. Brodzicka, B. C.K. Casey, P. Chang, Y. Chao, B. G. Cheon, R. Chistov, S. K. Choi, Y. Choi, M. Danilov, L. Y. Dong, A. Drutskoy, S. Eidelman, V. Eiges, Y. Enari, C. Fukunaga, N. Gabyshev, A. Garmash, T. Gershon, R. Guo, F. Handa, T. Hara, Y. Harada, H. Hayashii, M. Hazumi, E. M. Heenan, I. Higuchi, T. Hojo, T. Hokuue, Y. Hoshi, K. Hoshina, S. R. Hou, W. S. Hou, H. C. Huang, T. Igaki, Y. Igarashi, K. Inami, A. Ishikawa, R. Itoh, M. Iwamoto, H. Iwasaki, Y. Iwasaki, H. K. Jang, J. Kaneko, J. H. Kang, J. S. Kang, P. Kapusta, S. U. Kataoka, N. Katayama, H. Kawai, Y. Kawakami, N. Kawamura, T. Kawasaki, H. Kichimi, D. W. Kim, H. Kim, H. J. Kim, H. O. Kim, H. Kim, S. K. Kim, T. H. Kim, P. Krokovny, R. Kulasiri, S. Kumar, A. Kuzmin, Y. J. Kwon, G. Leder, S. H. Lee, J. Li, D. Liventsev, R. S. Lu, J. MacNaughton, G. Majumder, F. Mandl, S. Matsumoto, T. Matsumoto, K. Miyabayashi, H. Miyake, H. Miyata, G. R. Moloney, T. Mori, T. Nagamine, Y. Nagasaka, E. Nakano, M. Nakao, J. W. Nam, Z. Natkaniec, K. Neichi, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, F. Ohno, T. Ohshima, T. Okabe, S. Okuno, S. L. Olsen, Y. Onuki, W. Ostrowicz, H. Ozaki, P. Pakhlov, H. Palka, C. W. Park, H. Park, K. S. Park, L. S. Peak, J. P. Perroud, M. Peters, L. E. Piilonen, N. Root, K. Rybicki, H. Sagawa, S. Saitoh, Y. Sakai, M. Satapathy, O. Schneider, S. Schrenk, C. Schwanda, S. Semenov, K. Senyo, R. Seuster, M. E. Sevior, H. Shibuya, B. Shwartz, V. Sidorov, J. B. Singh, S. Stanic, M. Staric, A. Sugiyama, K. Sumisawa, T. Sumiyoshi, S. Suzuki, S. K. Swain, T. Takahashi, F. Takasaki, K. Tamai, N. Tamura, M. Tanaka, G. N. Taylor, Y. Teramoto, S. Tokuda, T. Tomura, S. N. Tovey, T. Tsuboyama, T. Tsukamoto, S. Uehara, K. Ueno, S. Uno, S. E. Vahsen, G. Varner, K. E. Varvell, C. C. Wang, C. H. Wang, J. G. Wang, M. Z. Wang, Y. Watanabe, E. Won, B. D. Yabsley, Y. Yamada, A. Yamaguchi, Y. Yamashita, M. Yamauchi, H. Yanai, J. Yashima, Y. Yuan, Y. Yusa, J. Zhang, Z. P. Zhang, V. Zhilich, D. Žontar

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Abstract

The production of the Χc2 charmonium state in two-photon collisions has been measured with the Belle detector at the KEKB e+e- collider. A clear signal for Χc2 → γ J / ψ, J / ψ → ℓ+- is observed in a 32.6 fb-1 data sample accumulated at center-of-mass energies near 10.6 GeV, and the product of its two-photon decay width and branching fraction is determined to be Λγγ (Xc2)Β(Xc2 → γ J / ψ)Β(J / ψ → ℓ+-) = 13.5 ±(stat.) ± 1.1(syst.) eV.

Original languageEnglish
Pages (from-to)33-42
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume540
Issue number1-2
DOIs
Publication statusPublished - 2002 Jul 25

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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    Abe, K., Abe, K., Abe, R., Abe, T., Adachi, I., Ahn, B. S., Aihara, H., Akatsu, M., Asano, Y., Aso, T., Aulchenko, V., Aushev, T., Bakich, A. M., Ban, Y., Banas, E., Bay, A., Behera, P. K., Bondar, A., Bozek, A., ... Žontar, D. (2002). Measurement of Χc2 production in two-photon collisions. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 540(1-2), 33-42. https://doi.org/10.1016/S0370-2693(02)02104-4