Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2503.17614 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915252964163584 |
|---|---|
| author | Jung, Woo Seung Ichikawa, Yudai Kang, Byung Min Ahn, Jung Keun Choi, Sung Wook Fujita, Manami Harada, Takeshi Hasegawa, Shoichi Hayakawa, Shuhei Hwang, Sang Hoon Hicks, Kenneth Imai, Ken'ichi Ishikawa, Yuji Kajikawa, Shunsuke Kamada, Kento Kim, Shin Hyung Kitaoka, Tomomasa Lee, Jaeyong Lee, Jong Won Miwa, Koji Morino, Taito Oura, Fumiya Sako, Hiroyuki Sakao, Tamao Saito, Masayoshi Sato, Susumu Tamura, Hirokazu Tanida, Kiyoshi Takahashi, Toshiyuki Ukai, Mifuyu Wada, Shunsuke Yamamoto, Takeshi O. Yang, Seongbae |
| author_facet | Jung, Woo Seung Ichikawa, Yudai Kang, Byung Min Ahn, Jung Keun Choi, Sung Wook Fujita, Manami Harada, Takeshi Hasegawa, Shoichi Hayakawa, Shuhei Hwang, Sang Hoon Hicks, Kenneth Imai, Ken'ichi Ishikawa, Yuji Kajikawa, Shunsuke Kamada, Kento Kim, Shin Hyung Kitaoka, Tomomasa Lee, Jaeyong Lee, Jong Won Miwa, Koji Morino, Taito Oura, Fumiya Sako, Hiroyuki Sakao, Tamao Saito, Masayoshi Sato, Susumu Tamura, Hirokazu Tanida, Kiyoshi Takahashi, Toshiyuki Ukai, Mifuyu Wada, Shunsuke Yamamoto, Takeshi O. Yang, Seongbae |
| contents | We present a measurement of the production of $Ξ^-$ and $ΛΛ$ in the $^{12}$C$(K^-, K^+)$ reaction at an incident beam momentum of 1.8 GeV/$\mathit{c}$, based on high-statistics data from J-PARC E42. The cross section for the $^{12}$C$(K^-, K^+Ξ^-)$ reaction, compared to the inclusive $^{12}$C$(K^-, K^+)$ reaction cross section, indicates that the $Ξ^-$ escaping probability peaks at 70\% in the energy region of $E_Ξ=$100 to 150 MeV above the $Ξ^-$ emission threshold. A classical approach using eikonal approximation shows that the total cross sections for $Ξ^-$ inelastic scattering ranges between 42 mb and 23 mb in the $Ξ^-$ momentum range from 0.4 to 0.6 GeV/c. Furthermore, based on the relative cross section for the $^{12}$C$(K^-, K^+ΛΛ)$ reaction, the total cross section for $Ξ^-p\toΛΛ$ is estimated in the same approach to vary between 2.2 mb and 1.0 mb in the momentum range of 0.40 to 0.65 GeV/c. Specifically, a cross section of 1.0 mb in the momentum range of 0.5 to 0.6 GeV/c imposes a constraint on the upper bound of the decay width of the $Ξ^-$ particle in infinite nuclear matter, revealing $Γ_Ξ< \sim 0.6$ MeV. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_17614 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Cross section Measurements for $^{12}$C$(K^-, K^+Ξ^-)$ and $^{12}$C$(K^-, K^+ΛΛ)$ Reactions at 1.8 GeV$/c$ Jung, Woo Seung Ichikawa, Yudai Kang, Byung Min Ahn, Jung Keun Choi, Sung Wook Fujita, Manami Harada, Takeshi Hasegawa, Shoichi Hayakawa, Shuhei Hwang, Sang Hoon Hicks, Kenneth Imai, Ken'ichi Ishikawa, Yuji Kajikawa, Shunsuke Kamada, Kento Kim, Shin Hyung Kitaoka, Tomomasa Lee, Jaeyong Lee, Jong Won Miwa, Koji Morino, Taito Oura, Fumiya Sako, Hiroyuki Sakao, Tamao Saito, Masayoshi Sato, Susumu Tamura, Hirokazu Tanida, Kiyoshi Takahashi, Toshiyuki Ukai, Mifuyu Wada, Shunsuke Yamamoto, Takeshi O. Yang, Seongbae Nuclear Experiment High Energy Physics - Phenomenology We present a measurement of the production of $Ξ^-$ and $ΛΛ$ in the $^{12}$C$(K^-, K^+)$ reaction at an incident beam momentum of 1.8 GeV/$\mathit{c}$, based on high-statistics data from J-PARC E42. The cross section for the $^{12}$C$(K^-, K^+Ξ^-)$ reaction, compared to the inclusive $^{12}$C$(K^-, K^+)$ reaction cross section, indicates that the $Ξ^-$ escaping probability peaks at 70\% in the energy region of $E_Ξ=$100 to 150 MeV above the $Ξ^-$ emission threshold. A classical approach using eikonal approximation shows that the total cross sections for $Ξ^-$ inelastic scattering ranges between 42 mb and 23 mb in the $Ξ^-$ momentum range from 0.4 to 0.6 GeV/c. Furthermore, based on the relative cross section for the $^{12}$C$(K^-, K^+ΛΛ)$ reaction, the total cross section for $Ξ^-p\toΛΛ$ is estimated in the same approach to vary between 2.2 mb and 1.0 mb in the momentum range of 0.40 to 0.65 GeV/c. Specifically, a cross section of 1.0 mb in the momentum range of 0.5 to 0.6 GeV/c imposes a constraint on the upper bound of the decay width of the $Ξ^-$ particle in infinite nuclear matter, revealing $Γ_Ξ< \sim 0.6$ MeV. |
| title | Cross section Measurements for $^{12}$C$(K^-, K^+Ξ^-)$ and $^{12}$C$(K^-, K^+ΛΛ)$ Reactions at 1.8 GeV$/c$ |
| topic | Nuclear Experiment High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2503.17614 |