Core Polarization and Tensor Coupling Effects on Magnetic Moments of Hypernuclei
YAO Jiang-Ming1, LU Hong-Feng2, Hillhouse Greg3, MENG Jie 1,2,3,4
1School of Phyics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 1008712College of Science, Chinese Agriculture University, Beijing 1000833Department of Physics, University of Stellenbosch, Stellenbosch, South Africa4Institute of Theoretical Physics, Chinese Academy of Sciences,Beijing 1000805Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000
Core Polarization and Tensor Coupling Effects on Magnetic Moments of Hypernuclei
YAO Jiang-Ming1; LU Hong-Feng2;Hillhouse Greg3;MENG Jie 1,2,3,4
1School of Phyics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 1008712College of Science, Chinese Agriculture University, Beijing 1000833Department of Physics, University of Stellenbosch, Stellenbosch, South Africa4Institute of Theoretical Physics, Chinese Academy of Sciences,Beijing 1000805Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator, Lanzhou 730000
摘要Effects of core polarization and tensor coupling on the magnetic moments in 13ΛC, 17Λ, and 41ΛCa Λ-hypernuclei are studied by employing the Dirac equation with scalar, vector and tensor potentials. It is found that the effect of core polarization on the magnetic moments is suppressed by Λ tensor coupling. The Λ tensor potential reduces the spin--orbit splitting of pΛ states considerably. However, almost the same magnetic moments are obtained using the hyperon wavefunction obtained via the Dirac equation either with or without the Λ tensor potential in the electromagnetic current vertex. The deviations of magnetic moments for pΛ states from the Schmidt values are found to increase with nuclear mass number.
Abstract：Effects of core polarization and tensor coupling on the magnetic moments in 13ΛC, 17Λ, and 41ΛCa Λ-hypernuclei are studied by employing the Dirac equation with scalar, vector and tensor potentials. It is found that the effect of core polarization on the magnetic moments is suppressed by Λ tensor coupling. The Λ tensor potential reduces the spin--orbit splitting of pΛ states considerably. However, almost the same magnetic moments are obtained using the hyperon wavefunction obtained via the Dirac equation either with or without the Λ tensor potential in the electromagnetic current vertex. The deviations of magnetic moments for pΛ states from the Schmidt values are found to increase with nuclear mass number.
(Forces in hadronic systems and effective interactions)
引用本文:
YAO Jiang-Ming; LU Hong-Feng;Hillhouse Greg;MENG Jie;;. Core Polarization and Tensor Coupling Effects on Magnetic Moments of Hypernuclei[J]. 中国物理快报, 2008, 25(5): 1629-1632.
YAO Jiang-Ming, LU Hong-Feng, Hillhouse Greg, MENG Jie, ,. Core Polarization and Tensor Coupling Effects on Magnetic Moments of Hypernuclei. Chin. Phys. Lett., 2008, 25(5): 1629-1632.
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