EPJ Web of Conferences (Jan 2022)

Development of a triple coincidence method of reaction, gamma-ray, and weak decay in the hypernuclear gamma-ray spectroscopy at J-PARC

  • Oura Fumiya,
  • Fujita Manami,
  • Ishikawa Yuji,
  • Rogers Tatyana G.,
  • Tamura Hirokazu,
  • Ukai Mifuyu,
  • Yamamoto Takeshi O.

DOI
https://doi.org/10.1051/epjconf/202227111007
Journal volume & issue
Vol. 271
p. 11007

Abstract

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To understand the mechanism of the charge symmetry breaking between 4ΛH and 4ΛHe, we plan to measure the gamma-transition energy of 4ΛH (1+ → 0+) with a Ge detector array. For identification of the hypernucleus, we will perform triple coincidence with the reaction, γ-ray, and weak decay for the first time. We measure the pion from weak decay with a range counter. This method will enable γ-ray spectroscopy of various hyperfragments which cannot be directly produced by (K−, π−) or (π+, K+) reactions.