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Nuclear K¯ bound states in light nuclei

Yoshinori Akaishi1 and Toshimitsu Yamazaki2

  • 1Institute of Particle and Nuclear Studies, KEK, Tsukuba 305-0801, Japan
  • 2RI Beam Science Laboratory, RIKEN, Wako 351-0198, Japan

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Phys. Rev. C 65, 044005 – Published 1 April, 2002

DOI: https://doi.org/10.1103/PhysRevC.65.044005

Abstract

The possible existence of deeply bound nuclear K¯ states is investigated theoretically for few-body systems. The nuclear ground states of a K− in 3He, 4He, and 8Be are predicted to be discrete states with binding energies of 108, 86, and 113 MeV and widths of 20, 34, and 38 MeV, respectively. The smallness of the widths arises from their energy-level locations below the Σπ emission threshold. It is found that a substantial contraction of the surrounding nucleus is induced due to the strong attraction of the I=0 K¯N pair, thus forming an unusually dense nuclear medium. Formation of the T=0K−⊗3He+K0⊗3H state in the 4He (stopped K−, n) reaction is proposed, with a calculated branching ratio of about 2%.

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Phys. Rev. C 65, 044005– Published 1 April, 2002
  • Received 21 August 2001

© 2002 American Physical Society

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