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

Chiba, M.; Doi, K.; Fujitani, T.; Iwahori, J.; Kawaguti, M.; Kobayashi, M.; Koike, M.; Kozuki, T.; Kurokawa, S.; Kusumoto, Hazime; Nagano, Hiroyuki; Nagashima, Y.; Omori, T.; Sugimoto, S.; Takasaki, M.; Takéutchi, F.; Tsuchiya, Masato; Ueda, Masahiko; Yamaguchi, Y.; Yoshida, Hajime

doi:10.1016/0370-2693(86)91060-9

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Cited by 15 publications

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“…This experiment was designed to search for narrow lines in the momentum distributions of π 0 and η from pp annihilation. The initial aim was to find narrow multiquark or quasi-nuclear bound states [102][103][104][105]. Later, frequencies for annihilation into two narrow mesons were determined with both H 2 [106,107] and D 2 [108] targets.…”

Section: Experiments At Kekmentioning

confidence: 99%

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The antinucleon–nucleon interaction at low energy: Annihilation dynamics

2005

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The general properties of antiproton-proton annihilation at rest are presented, with special focus on the two-meson final states. The data exhibit remarkable dynamical selection rules: some allowed annihilation modes are suppressed by one order of magnitude with respect to modes of comparable phase-space. Various phenomenological analyses are reviewed, based on microscopic quark dynamics or symmetry considerations. The role of initial-and final-state interaction is also examined.

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Section: Experiments At Kekmentioning

confidence: 99%

“…1. A full description of the detector can be found in [102,103]. Antiprotons at 580 MeV/c, produced at the KEK 12 GeV proton synchrotron, were degraded in a graphite slab and stopped in a liquid H 2 target of 14 cm diameter and 23 cm in length.…”

Section: Experiments At Kekmentioning

confidence: 99%