Search for narrow states by detection of monochromatic gamma rays in p̄p annihilation at rest

M. Chiba, K. Doi, T. Fujitani, J. Iwahori, M. Kawaguti, M. Kobayashi, M. Koike, T. Kozuki, S. Kurokawa, H. Kusumoto, H. Nagano, Y. Nagashima, T. Omori, S. Sugimoto, M. Takasaki, F. Takeutchi, M. Tsuchiya, M. Ueda, Y. Yamaguchi, H. Yoshida

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Abstract

An inclusive γ ray spectrum in p̄p annihilation at rest has been measured with modularized NaI(Tℓ) detectors with statistics several times higher than before. The aim of the experiment was to search for baryonium B in p̄p → γB by detection of narrow lines in the γ ray spectrum. We have not observed any narrow state B with yield greater than 1.5 × 10-3 per annihilation and with statistical significance higher than 2σ.

Original languageEnglish
Pages (from-to)217-222
Number of pages6
JournalPhysics Letters B
Volume177
Issue number2
DOIs
Publication statusPublished - 1986 Sep 11
Externally publishedYes

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Chiba, M., Doi, K., Fujitani, T., Iwahori, J., Kawaguti, M., Kobayashi, M., Koike, M., Kozuki, T., Kurokawa, S., Kusumoto, H., Nagano, H., Nagashima, Y., Omori, T., Sugimoto, S., Takasaki, M., Takeutchi, F., Tsuchiya, M., Ueda, M., Yamaguchi, Y., & Yoshida, H. (1986). Search for narrow states by detection of monochromatic gamma rays in p̄p annihilation at rest. Physics Letters B, 177(2), 217-222. https://doi.org/10.1016/0370-2693(86)91060-9