2000/12/01 by B. Loiseau, S. Wycech · 1 citation
Physics and Astronomy · #Atomic and Molecular Physics #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevc.63.034003
published as Phys.Rev. C63 (2001) 034003 · 12 pages, 1 figure, Use of Revtex.sty
arxiv created 2000/12/01 · openalex publication_date 2001/02/20 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The latest measurements of the atomic level width in \ensuremathΣ-hyperonic Pb atoms offer the most accurate datum in the region of low-energy \ensuremathΣ-hyperon physics. Atomic widths are due to the \ensuremathΣN-\ensuremathΛN conversion which in high-angular-momentum states is dominated by one-pion exchange. A joint analysis of the \ensuremathΣ^\ensuremath-\stackrel\ensuremath→p\ensuremathΛn scattering data and atomic widths allows us to extract the pion-hyperon coupling constant f_\ensuremathπ\ensuremathΛ\ensuremathΣ2/4\ensuremathπ=0.048\ifmmode±\else\textpm\fi0.005 (stat) \ifmmode±\else\textpm\fi0.004 (syst) or G_\ensuremathπ\ensuremathΛ\ensuremathΣ2=13.3\ifmmode±\else\textpm\fi1.4 (stat) \ifmmode±\else\textpm\fi1.1 (syst).