Year: 2006
Type: article
Abstract: The Λ- and Ξ − -hyperon mean free paths in finite nuclei are firstly calculated in the relativistic mean-field theory. The real optical potentials are derived from the RMF approach, while the imaginary parts are obtained from the assumptions: U S IY = α σY · U S IN and U V IY = α ωY · U V IN . With these assumptions, the depth of the imaginary potential for Ξ − is W Ξ ≃ − 3.5 MeV, and for Λ is W Λ ≃ − 7 MeV at low incident energy. We find that the hyperon MFP decreases with the increment of the incident energies of the hyperon (from 200 MeV to 800 MeV); and in the nuclear interior, the MFP is about 2–3 fm for Λ, and about 4–8 fm for Ξ − , depending on the incident energy of the hyperon.
Source: Europhysics Letters (EPL)
Authors: Q. L Wang, L Dang, X. H Zhong, C. Y Song, P. Z Ning
Institution: Nankai University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2061996916