Optical potential study of Σ nuclear states |
| |
Authors: | A Gal G Toker Y Alexander |
| |
Affiliation: | Brookhaven National Laboratory, Upton, New York 11973 USA;Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 USA;Racah Institute of Physics, The Hebrew University, Jerusalem 91904, Israel |
| |
Abstract: | Single-particle energies and widths of Σ hypernuclear states are calculated in light systems (A ≤ 40) as energy eigenvalues of the Schrödinger equation for a complex optical potential that fits level shifts and widths of Σ? atoms. The interpretation and significance of Σ (normalizable) bound states embedded in the Λ hypernuclear (as well as, sometimes, in the Σ hypernuclear) continuum are discussed and their properties are studied, primarily in order to identify relatively narrow (Γ ? 10 MeV) states. The connection between these calculations and the recently observed Σ hypernuclear states suggests that bound states embedded in the Σ continuum, rather than (nonnormalizable) Gamow resonant states, are produced in (K?, π) nuclear reactions. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|