2022年2月18日
Precise Measurement of Differential Cross Sections of the Σ-p → Λn Reaction in Momentum Range 470-650 MeV /c
Physical Review Letters
- 巻
- 128
- 号
- 7
- 開始ページ
- 072501
- 終了ページ
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevLett.128.072501
The differential cross sections of the ς-p→Λn reaction were measured accurately for the ς- momentum (pς) ranging from 470 to 650 MeV/c at the J-PARC Hadron Experimental Facility. Precise angular information about the ς-p→Λn reaction was obtained for the first time by detecting approximately 100 reaction events at each angular step of Δcosθ=0.1. The obtained differential cross sections show a slightly forward-peaking structure in the measured momentum regions. The cross sections integrated for -0.7≤cosθ≤1.0 were obtained as 22.5±0.68 [statistical error(stat.)] ±0.65 [systematic error(syst.)] mb and 15.8±0.83(stat)±0.52(syst) mb for 470<pς(MeV/c)<550 and 550<pς(MeV/c)<650, respectively. These results show a drastic improvement compared with past measurements of the hyperon-proton scattering experiments. They will play essential roles in updating the theoretical models of the baryon-baryon interactions.
- リンク情報
- ID情報
-
- DOI : 10.1103/PhysRevLett.128.072501
- ISSN : 0031-9007
- eISSN : 1079-7114
- PubMed ID : 35244436
- SCOPUS ID : 85125882447