Searches for a narrow resonance in the ppπ- system

L. S. Vorobyev, Yu G. Grishuk, Yu V. Efremenko, M. V. Kossov, S. V. Kuleshov, G. A. Leksin, N. A. Pivnyuk, A. V. Smirnitsky, V. B. Fedorov, B. B. Shvartzman, S. M. Shuvalov, M. G. Schepkin

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3 Citations (Scopus)


The ppπ system whose quantum numbers may assume values that are forbidden for the NN system is investigated for the first time in the reaction pp → ppπ-π+. The experiment was performed at ITEP (Moscow). The invariant-mass distribution of the ppπ- system reveals a resonance enhancement at M ≈ 2.06 GeV with a width about 10 MeV. The observed enhancement may signal the formation of a resonance state predicted by quark models and required for interpreting data on low-energy pion-nucleus scattering accompanied by double charge exchange.
Original languageEnglish
Pages (from-to)771-780
Number of pages10
JournalPhysics of Atomic Nuclei
Publication statusPublished - 1 May 1998
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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