Double antikaonic nuclear clusters in antiproton-3He annihilation at J-PARC

Fuminori Sakuma, Catalina Curceanu, Masahiko Iwasaki, Paul Kienle, Hiroaki Ohnishi, Makoto Tokuda, Kyo Tsukada, Eberhard Widmann, Toshimitsu Yamazaki, Johannes Zmeskal

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3 Citations (Scopus)


We search for double anti-kaon nuclear bound states in the p̄ annihilation reaction in 3He nuclei at rest. In view of the strongly attractive K̄ interaction, the existence of nuclear clusters with more than one K- has been predicted theoretically. The double anti-kaon production in elementary antiproton annihilation at rest is forbidden because of the negative Q-value; however, a double anti-kaon nuclear bound state, such as K- K- pp, with deep binding energy would enable double anti-kaon production in the nuclei. In order to investigate the K- K- pp production in the p̄+3 He → K++K0+X (X = K-K-pp) channel, the produced K- K- pp cluster is identified both using missing mass spectroscopy via the K+K0 channel with a Λ-tag, and invariant mass analysis of the expected decay particles from the K- K- pp cluster such as ΛΛ. We propose to perform the experiment at the existing K1. 8BR beam line at J-PARC with the E15 spectrometer.

Original languageEnglish
Pages (from-to)51-61
Number of pages11
JournalHyperfine Interactions
Issue number1-3
Publication statusPublished - 2012 Dec


  • Antikaonic nuclear clusters
  • High density nuclear system


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