Cross Section Measurements for 12C( <i>K</i> −, <i>K</i> +Ξ−) and 12C( <i>K</i> −, <i>K</i> +Λ Λ) Reactions at 1.8 GeV/ <i>c</i>
Abstract We present a measurement of the production of $\Xi ^-$ and $\Lambda \Lambda$ in the $^{12}$C$(K^-, K^+)$ reaction at an incident beam momentum of 1.8 GeV$/c$, based on high-statistics data from J-PARC E42. The cross section for the $^{12}$C$(K^-, K^+\Xi ^-)$ reaction, compared to the inclusive $^{12}$C$(K^-, K^+)$ reaction cross section, indicates that the $\Xi ^-$ emission probability peaks at 70% in the energy region of $E_\Xi =100$–150 MeV above the $\Xi ^-$ emission threshold. A classical approach using eikonal approximation shows that the total cross section for $\Xi ^-$ inelastic scattering ranges between 42 mb and 23 mb in the $\Xi ^-$ momentum range from 0.4 to 0.6 GeV$/c$. Furthermore, based on the relative cross section for the $^{12}$C$(K^-, K^+\Lambda \Lambda )$ reaction, the total cross section for $\Xi ^-p\rightarrow \Lambda \Lambda$ is estimated in the same approach to vary between 2.2 mb and 1.0 mb in the momentum range of 0.40–0.65 GeV$/c$. Specifically, a cross section of 1.0 mb in the momentum range of 0.5–0.6 GeV$/c$ imposes a constraint on the upper bound of the decay width of the $\Xi ^-$ particle in infinite nuclear matter, revealing $\Gamma _\Xi &lt; \sim 0.6$ MeV.
Authors
- Hirokazu Tamura
- Kento Kamada
- M. Saito (ORCID: https://orcid.org/0000-0002-4262-719X)
- M. Ukai (ORCID: https://orcid.org/0000-0001-8011-8268)
- K. Miwa (ORCID: https://orcid.org/0000-0001-6888-8518)
- H. Sako (ORCID: https://orcid.org/0000-0002-4273-4470)
- Fumiya Oura
- Shin Hyung Kim
- T. Kitaoka
- Shoichi Hasegawa (ORCID: https://orcid.org/0000-0001-5525-2924)
- T. Takahashi (ORCID: https://orcid.org/0000-0001-5237-3122)
- Seongbae Yang
- Kiyoshi Tanida (ORCID: https://orcid.org/0000-0002-8255-3746)
- J. K. Ahn (ORCID: https://orcid.org/0000-0002-5795-2243)
- T. Sakao
- Shuhei H. Hayakawa (ORCID: https://orcid.org/0000-0002-8301-8067)
- Tatsuro Morino
- Yuji Ishikawa (ORCID: https://orcid.org/0000-0003-0084-2585)
- Jaeyong Lee (ORCID: https://orcid.org/0000-0002-2724-8888)
- Jong Won Lee (ORCID: https://orcid.org/0000-0002-2203-3634)
- Woo Seung Jung (ORCID: https://orcid.org/0009-0001-9124-6828)
- Byung Min Kang
- T. Harada (ORCID: https://orcid.org/0000-0002-5240-829X)
- Sung Wook Choi
- Susumu Sato
- Shunsuke Kajikawa
- T. O. Yamamoto
- Manami Fujita
- Ken’ichi Imai
- Shunsuke Wada
- K. Hicks
- Y. Ichikawa (ORCID: https://orcid.org/0000-0001-7754-6368)
- Sang Hoon Hwang (ORCID: https://orcid.org/0009-0006-2248-4108)
Institutions
- Japan Atomic Energy Agency (JP)
- High Energy Accelerator Research Organization (JP)
- Seoul National University (KR)
- Korea University (KR)
- Tohoku University (JP)
- Kyoto University (JP)
- Korea Research Institute of Standards and Science (KR)
- Kyungpook National University (KR)
- Ohio University (US)
- Advanced Science Research Center (JP)
Publication Details
- Journal
- Progress of Theoretical and Experimental Physics
- Published
- 2025-04-25
- DOI
- https://doi.org/10.1093/ptep/ptaf064
- Primary Topic
- Particle physics theoretical and experimental studies
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Research Foundation
- Ministry of Education, Culture, Sports, Science and Technology