Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/11009
Title: | Lambda Lambda bond energy from the Nijmegen potentials |
Author: | Vidaña Haro, Isaac Ramos Gómez, Àngels Polls Martí, Artur |
Keywords: | Estructura nuclear Mecànica estadística Nuclear structure Statistical mechanics |
Issue Date: | 2004 |
Publisher: | The American Physical Society |
Abstract: | The $\ensuremath{\Lambda}\ensuremath{\Lambda}$ bond energy $\ensuremath{\Delta}{B}_{\ensuremath{\Lambda}\ensuremath{\Lambda}}$ in $\ensuremath{\Lambda}\ensuremath{\Lambda}$ hypernuclei is obtained from a $G$-matrix calculation which includes the coupling between the $\ensuremath{\Lambda}\ensuremath{\Lambda}$, $\ensuremath{\Xi}N$, and $\ensuremath{\Sigma}\ensuremath{\Sigma}$ channels, as well as the effect of Pauli blocking to all orders. The Nijmegen NSC97e model is used as bare baryon-baryon interaction in the strangeness $S=\ensuremath{-}2$ sector. The $\ensuremath{\Lambda}\ensuremath{\Lambda}$-$\ensuremath{\Xi}N$ coupling increases substantially the bond energy with respect to the uncoupled $\ensuremath{\Lambda}\ensuremath{\Lambda}$ case. However, the additional incorporation of the $\ensuremath{\Sigma}\ensuremath{\Sigma}$ channel, which couples simultaneously to $\ensuremath{\Lambda}\ensuremath{\Lambda}$ and $\ensuremath{\Xi}N$ states, has a surprisingly drastic effect and reduces the bond energy down to a value closer to that obtained in an uncoupled calculation. We find that a complete treatment of Pauli blocking reduces the repulsive effect on the bond energy to about half of what was claimed before. |
Note: | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevC.70.024306 |
It is part of: | Physical Review C, 2004, vol. 70, núm. 2, p. 024306-1-024306-5 |
URI: | http://hdl.handle.net/2445/11009 |
Related resource: | http://dx.doi.org/10.1103/PhysRevC.70.024306 |
ISSN: | 0556-2813 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
520800.pdf | 52.47 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.