Search for χc2 production in two-photon processes

S. Uehara, K. Abe, K. Amako, Y. Arai, Y. Asano, M. Chiba, Y. Chiba, M. Daigo, M. Fukuwa, T. Fukui, Y. Fukushima, J. Haba, Y. Hemmi, M. Higuchi, F. Hinode, T. Hirose, Y. Hojyo, Y. Homma, Y. Hoshi, N. IshiharaT. Kamitani, N. Kanematsu, N. Kanda, J. Kanzaki, R. Kikuchi, T. Kondo, T. T. Korhonen, T. Koseki, H. Kurashige, T. Matsui, M. Minami, K. Miyake, S. Mori, Y. Nagashima, T. Nakamura, I. Nakano, Y. Narita, S. Odaka, K. Ogawa, T. Ohama, T. Ohsugi, A. Okamoto, A. Ono, T. Oyama, H. Sakamoto, M. Sakuda, N. Sasao, M. Sato, H. Shibuya, M. Shioden, J. Shirai, M. Shirakata, S. Sugimoto, T. Sumiyoshi, A. Suzuki, Y. Takada, H. Takaki, F. Takasaki, A. Taketani, M. Takita, N. Tamura, N. Terunuma, K. Tobimatsu, T. Tsuboyama, Y. Unno, M. Utsumi, T. Watanabe, Y. Watase, F. Yabuki, Y. Yamada, Y. Yonezawa, H. Yoshida

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Abstract

A search has been made for the production of a charmonium state χc2 in two-photon processes. We have used the decay channel χc2→γJ/ψ, J/ψ→ℓ+-. No signal enhancement indicating the production of χc2 has been observed in the invariant mass distributions of the final state particles, and an upper limit for the two-photon decay width, Γγγc2)<4.2 keV at 95% CL, has been obtained.

Original languageEnglish
Pages (from-to)188-192
Number of pages5
JournalPhysics Letters B
Volume266
Issue number1-2
DOIs
Publication statusPublished - Aug 22 1991
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Uehara, S., Abe, K., Amako, K., Arai, Y., Asano, Y., Chiba, M., Chiba, Y., Daigo, M., Fukuwa, M., Fukui, T., Fukushima, Y., Haba, J., Hemmi, Y., Higuchi, M., Hinode, F., Hirose, T., Hojyo, Y., Homma, Y., Hoshi, Y., ... Yoshida, H. (1991). Search for χc2 production in two-photon processes. Physics Letters B, 266(1-2), 188-192. https://doi.org/10.1016/0370-2693(91)90766-J