Measurement of monoenergetic neutrons from the {bar p}d reaction at rest
Journal Article
·
· Physical Review, D
OSTI ID:441041
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- Faculty of Engineering, Fukui University, Fukui 910 (Japan)
- Institute for Nuclear Study, University of Tokyo, Tanashi, Tokyo 138 (Japan)
- National Laboratory for High Energy Physics (KEK), Tsukiba 305 (Japan)
- Faculty of Science, Kyoto Sangyo University, Kitaku, Kyoto 603 (Japan)
- Faculty of Science and Technology, Meisei University, Hino 191 (Japan)
- Physics Department, Osaka University, Toyonaka, Osaka 560 (Japan)
- Physics Department, Tokyo Metropolitan University, Hachioji 192-03 (Japan)
To search for baryonium states, a highly sensitive experiment with good statistics has been carried out at KEK by using an antiproton beam, deuterium target, and time-of-flight counter together with a modularized NaI(Tl) detector. At the 4{sigma} level, no narrow peaks due to the production of baryonia in the {bar p}d{r_arrow}Bn reaction have been observed in the neutron spectra. At lower significance levels, however, we have observed four narrow peaks with 3.7{sigma}{minus}3.5{sigma}, and two at an even lower significance level, in different charge-multiplicity final states. The recoil momentum distribution of the neutrons has been extracted for the channel with zero charge prongs. The energy spectra for {gamma} rays in coincidence with the neutron have been also obtained. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 441041
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 1 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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