open access

https://hdl.handle.net/2115/95810

Continuum Λ spectra for a 6ΛLi hypernucleus in the 6Li(𝐾−, 𝜋−) reaction

英語

Λ-nucleus potential

2025-06-17

American Physical Society (APS)

Physical Review C

111(6)

064617

We theoretically investigate Lambda production via a (K-, pi-) reaction on a 6Li target, using the distorted-wave impulse approximation with a Fermi-averaged K-n-* pi-Lambda amplitude. We calculate Lambda production spectra using the Green's function method for a 5Li nuclear core + Lambda system, employing a Lambda folding-model potential based on the 5Li nuclear density, which is constructed from alpha-p and 3He-d cluster wave functions. The results show that the calculated spectrum, which includes Lambda bound, resonance, and continuum states, agrees well with the experimental data from the (K-, pi-) reaction at pK-= 790 MeV/c (0 degrees), where substitutional (0p, 0p-1)Lambda n and (0s, 0s-1)Lambda n configurations dominate in the near-recoilless reactions. A narrow peak corresponds to a high-lying excited state with spin-parity JP = 1+ at E Lambda = 13.8 MeV near the 3He + d + Lambda threshold, arising from interference effects between 5Li(3/2+) (R) (0s1/2)Lambda and 5Li(1/2+) (R) (0s1/2)Lambda components. This study offers a valuable framework for extracting essential information on the structure and production mechanisms of hypernuclear states from experimental data.

学術雑誌論文

Accepted Manuscript

©2025 American Physical Society

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