Search for narrow peaks in inclusive π0 spectra from pp 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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35 Citations (Scopus)


By using modularized NaI(Tl) detectors, we carried out a high statistics measurement of inclusive π0 spectra from pp annihilation at rest. We did not observe any narrow π0 peaks arising from baryonium production, pp→π0B. The σ upper limit of the yield varied between 10-2 and 10-4 depending on the mass and oncharge multiplicity. Three narrow peaks at 2 σ levels were seen at approximately the same masses as in the previous measurement of pp→ γB.We also derived the yield of pp annihilation into π0M forM = ø, η′, ω, ρ{variant}0, η and π0.

Original languageEnglish
Pages (from-to)447-452
Number of pages6
JournalPhysics Letters B
Issue number3
Publication statusPublished - 1988 Mar 10
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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