Physics Letters B (Oct 2023)
Precise lifetime measurement of Λ4H hypernucleus using in-flight 4He(K−,π0)Λ4H reaction
- T. Akaishi,
- H. Asano,
- X. Chen,
- A. Clozza,
- C. Curceanu,
- R. Del Grande,
- C. Guaraldo,
- C. Han,
- T. Hashimoto,
- M. Iliescu,
- K. Inoue,
- S. Ishimoto,
- K. Itahashi,
- M. Iwasaki,
- Y. Ma,
- M. Miliucci,
- R. Murayama,
- H. Noumi,
- H. Ohnishi,
- S. Okada,
- H. Outa,
- K. Piscicchia,
- A. Sakaguchi,
- F. Sakuma,
- M. Sato,
- A. Scordo,
- K. Shirotori,
- D. Sirghi,
- F. Sirghi,
- S. Suzuki,
- K. Tanida,
- T. Toda,
- M. Tokuda,
- T. Yamaga,
- X. Yuan,
- P. Zhang,
- Y. Zhang,
- H. Zhang
Affiliations
- T. Akaishi
- Osaka University, Osaka, 567-0047, Japan
- H. Asano
- RIKEN, Wako, 351-0198, Japan
- X. Chen
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
- A. Clozza
- Laboratori Nazionali di Frascati dell' INFN, I-00044 Frascati, Italy
- C. Curceanu
- Laboratori Nazionali di Frascati dell' INFN, I-00044 Frascati, Italy
- R. Del Grande
- Laboratori Nazionali di Frascati dell' INFN, I-00044 Frascati, Italy
- C. Guaraldo
- Laboratori Nazionali di Frascati dell' INFN, I-00044 Frascati, Italy
- C. Han
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
- T. Hashimoto
- Japan Atomic Energy Agency, Tokai, 319-1195, Japan; Corresponding authors.
- M. Iliescu
- Laboratori Nazionali di Frascati dell' INFN, I-00044 Frascati, Italy
- K. Inoue
- Osaka University, Osaka, 567-0047, Japan
- S. Ishimoto
- High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801, Japan
- K. Itahashi
- RIKEN, Wako, 351-0198, Japan
- M. Iwasaki
- RIKEN, Wako, 351-0198, Japan
- Y. Ma
- RIKEN, Wako, 351-0198, Japan; Corresponding authors.
- M. Miliucci
- Laboratori Nazionali di Frascati dell' INFN, I-00044 Frascati, Italy
- R. Murayama
- RIKEN, Wako, 351-0198, Japan
- H. Noumi
- Osaka University, Osaka, 567-0047, Japan
- H. Ohnishi
- Tohoku University, Sendai, 982-0826, Japan
- S. Okada
- Chubu University, Kasugai, 487-8501, Japan
- H. Outa
- RIKEN, Wako, 351-0198, Japan
- K. Piscicchia
- Laboratori Nazionali di Frascati dell' INFN, I-00044 Frascati, Italy; CENTRO FERMI - Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, 00184 Rome, Italy
- A. Sakaguchi
- Osaka University, Osaka, 567-0047, Japan
- F. Sakuma
- RIKEN, Wako, 351-0198, Japan; Corresponding authors.
- M. Sato
- High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801, Japan
- A. Scordo
- Laboratori Nazionali di Frascati dell' INFN, I-00044 Frascati, Italy
- K. Shirotori
- Osaka University, Osaka, 567-0047, Japan
- D. Sirghi
- Laboratori Nazionali di Frascati dell' INFN, I-00044 Frascati, Italy; Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), Magurele, Romania
- F. Sirghi
- Laboratori Nazionali di Frascati dell' INFN, I-00044 Frascati, Italy; Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), Magurele, Romania
- S. Suzuki
- High Energy Accelerator Research Organization (KEK), Tsukuba, 305-0801, Japan
- K. Tanida
- Japan Atomic Energy Agency, Tokai, 319-1195, Japan
- T. Toda
- Osaka University, Osaka, 567-0047, Japan
- M. Tokuda
- Osaka University, Osaka, 567-0047, Japan
- T. Yamaga
- RIKEN, Wako, 351-0198, Japan
- X. Yuan
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
- P. Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
- Y. Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
- H. Zhang
- Lanzhou University, Lanzhou, 730000, China
- Journal volume & issue
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Vol. 845
p. 138128
Abstract
We present a new measurement of the Λ4H hypernuclear lifetime using in-flight K− + 4He → Λ4H + π0 reaction at the J-PARC hadron facility. We demonstrate, for the first time, the effective selection of the hypernuclear bound state using only the γ-ray energy decayed from π0. This opens the possibility for a systematic study of isospin partner hypernuclei through comparison with data from (K−, π−) reaction. As the first application of this method, our result for the Λ4H lifetime, τ(HΛ4)=206±8(stat.)±12(syst.)ps, is one of the most precise measurements to date. We are also preparing to measure the lifetime of the hypertriton (Λ3H) using the same setup in the near future.
