Study of Λ-Hypernuclei with Stopped K^- Reaction

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概要

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• We summarize studies of Λ hypernuclei with stopped K^- reaction carried out at KEK. The π^- momentum spectra in the (stopped K^-, π^-) reaction were measured with light nuclear targets (^<4>He, ^<7>Li, ^<9>Be, ^<12>C and ^<16>O). The ground and excited states of ^<4>_<Λ>He, ^<12>_<Λ>C and ^<16>_<Λ>O were identified and their formation probabilities were measured. The branching ratios of π^0-mesonic decay of ^<4>_<Λ>He, ^<11>_<Λ>B and ^<12>_<Λ>C were measured for the first time with π^0 coincidence. The lifetime of ^<4>_<Λ>H was also determined with an improved accuracy. The π^- peak intensity from ^<4>_<Λ>H→^<4>He+π^- decay gave the ^<4>_<Λ>H formation probabiliries on these targets, where ^<4>_<Λ>H is produced as hyperfragment except for the casa of the ^<4>He target. Concerning the formation mechanism of hyperfragments and their application to hypernuclear γ-ray spectroscopy, the running experiments and future prospects are also described.

• 理論物理学刊行会の論文
• 1995-03-31

著者

• TAMURA Hirokazu

  Department of Physics, Tohoku University

• Hayano R

  Univ. Tokyo Tokyo Jpn

• Hayano R.

  Department Of Physics University Of Tokyo

• OUTA Haruhiko

  Institute of Particle and Nuclear Studies, KEK

• Outa Haruhiko

  Institute For Nuclear Study University Of Tokyo

• Yamazaki Toshimitsu

  Institute For Nuclear Study University Of Tokyo

• Yamazaki T

  Meson Science Laboratory University Of Tokyo:institute For Nuclear Study University Of Tokyo

• Yamazaki T

  Ri Beam Science Laboratory Riken

• HAYAKAWA T.

  Department Physics, Osaka University

• YAMAZAKI Toshimitsu

  The Institute of Physical and Chemical Research (RIKEN)

• Yamazaki Toshimitsu

  Meson Science Laboratory University Of Tokyo:institute For Nuclear Study University Of Tokyo

• Hayano Ryugo

  Univ. Of Tokyo

• Yamazaki T

  Nihon Univ. Tokyo Jpn

• HAYANO Ryugo

  Department of Physics, University of Tokyo

• Tamura Hirokazu

  Department Of Physics University Of Tokyo

• Tamura Hirokazu

  Department Of Physics Tohoku University

• Hayano Ryugo

  Department Of Physics The University Of Tokyo

• TAMURA Hirokazu

  Department of Physics, University of Tokyo

• YAMAZAKI Toshimitsu

  Institute for Nuclear Study, University of Tokyo

• Hayano R.S.

  Univ. of Tokyo

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