https://doi.org/10.1140/epja/i2013-13101-1
Regular Article - Theoretical Physics
Systematic study of hypernuclear magnetic moments under a perturb treatment
1
College of Science, China Agriculture University, 100083, Beijing, China
2
School of Physical Science and Technology, Southwest University, Chongqing, 400715, China
3
Center for Mathematical Sciences, University of Aizu, Ikki-machi, Aizu-Wakamatsu, Fukushima, 965-8580, Japan
* e-mail: hongfeng@cau.edu.cn
Received:
25
March
2013
Revised:
26
June
2013
Accepted:
15
July
2013
Published online:
6
August
2013
Hypernuclei ranged from light to heavy mass are systematically investigated using a relativistic mean-field (RMF) model with a novel proposed ωΛΛ tensor coupling interaction PK1-Y1. The tensor coupling effect on core polarization, and the orbital contribution to hyperon current are discussed. Contributions to the magnetic moment from pΛ and n −1 Λ systems are found to be opposite. An expression of the magnetic moment under perturb treatment is improved with an ωΛΛ tensor coupling and the core-polarized magnetic moment μ D pol. is found to be approximately proportional to the coupling strength g ωN · g ωλ 2 . Self-consistent calculations under a perturb treatment show a semi-linear relationship as μ D pol. ∼ g ωλ when g ωN is fixed.
© SIF, Springer-Verlag Berlin Heidelberg, 2013