Low-lying resonances of 9ΛBe: Faddeev calculation with Padé-approximants (CROSBI ID 157627)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Filikhin, I. ; Suslov, V. M. ; Vlahović, Branislav
engleski
Low-lying resonances of 9ΛBe: Faddeev calculation with Padé-approximants
Configuration space Faddeev equations are applied to describe the 9ΛBe hypernucleus in the ααΛ cluster model. For calculation of resonance state energies a variant of the method of analytical continuation in coupling constant is used. To realize this method, an auxiliary three-body potential is added to the Hamiltonian of the equations. A proper choice of strength parameter of the potential converts a resonance state into a bound state and an energy trajectory is obtained by variations of this parameter. To fulfill analytical continuation of this trajectory as a function of the strength parameter onto the complex plane, the Padé approximation is used. Spectrum of low-lying resonances is calculated with two αΛ phenomenological potentials. We predict existence of the 0+2 and 4+1 virtual states as well as the 2+2 resonance state near by the ααΛ threshold. The configuration for description of the 9ΛBe ground band is discussed.
three nucleon problem ; computation in configuration space
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Podaci o izdanju
790
2007.
695c-698c
objavljeno
0375-9474
1873-1554
10.1016/j.nuclphysa.2007.03.126