`` $Λ- Σ$ conversion in $^4_Λ$He and $^4_Λ$H based on four-body calculation

Details `` $Λ- Σ$ conversion in $^4_Λ$He and $^4_Λ$H based on four-body calculation `` $Λ- Σ$ conversion in $^4_Λ$He and $^4_Λ$H based on four-body calculation

2001-06-29

arxiv.org/abs/nucl-th/0106070v1

Phys.Rev. C65 (2002) 011301

Physics

Nuclear Physics

Nuclear Theory

14 pages, 8figures, submitted to Physical Review C

Scientific paper

10.1103/PhysRevC.65.011301

Precise four-body calculations for $^4_{\Lambda}$He and $^4_{\Lambda}$H have been performed in the framework of the variational method with Jacobian-coordinate Gaussian-basis functions. All the rearrangement channels of both $NNN \Lambda$ and $NNN \Sigma$ are explicitly taken into account for the first time with the use of realistic $NN$ and $YN$ interactions. The role of $\Lambda$-$\Sigma$ conversion and the amount of the virtual $\Sigma$-component in $^4_{\Lambda}$He and $^4_{\Lambda}$H are discussed.

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