Search for strange tribaryon states in the inclusive 4He(Kstopped-, p) reaction

M. Sato, H. Bhang, J. Chiba, Seonho Choi, Y. Fukuda, T. Hanaki, R. S. Hayano, M. Iio, T. Ishikawa, S. Ishimoto, T. Ishiwatari, K. Itahashi, M. Iwai, M. Iwasaki, P. Kienle, J. H. Kim, Y. Matsuda, H. Ohnishi, S. Okada, H. OutaS. Suzuki, T. Suzuki, D. Tomono, E. Widmann, T. Yamazaki, H. Yim

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56 Citations (Scopus)


A search for tribaryon states was performed at KEK-PS. We adopted the 4He(Kstopped-, p) reaction to populate the states with strangeness -1, charge 0 and isospin 1. No significant narrow structure was observed in the mass region from 3000 to 3200 MeV / c2 in an inclusive missing mass spectrum. The upper limit of the formation branching ratio was determined to be (0.4 - 6) × 10-4, (0.2 - 6) × 10-3 and (0.06 - 5) × 10-2 / (stopped   K-) with 95% confidence level for a narrow state with an assumed width of 0, 20 and 40 MeV / c2, respectively.

Original languageEnglish
Pages (from-to)107-112
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
Publication statusPublished - 2008 Jan 17
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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