Tensor coupling effects on spin symmetry in anti-Lambda spectrum of hypernuclei

Details Tensor coupling effects on spin symmetry in anti-Lambda spectrum of hypernuclei Tensor coupling effects on spin symmetry in anti-Lambda spectrum of hypernuclei

2010-04-14

arxiv.org/abs/1004.2313v1

Physics

Nuclear Physics

Nuclear Theory

12 pages, 3 figures,

Scientific paper

The effects of $\bar\Lambda\bar\Lambda\omega$-tensor coupling on the spin symmetry of $\bar{\Lambda}$ spectra in $\bar{\Lambda}$-nucleus systems have been studied with the relativistic mean-field theory. Taking $^{12}$C+$\bar{\Lambda}$ as an example, it is found that the tensor coupling enlarges the spin-orbit splittings of $\bar\Lambda$ by an order of magnitude although its effects on the wave functions of $\bar{\Lambda}$ are negligible. Similar conclusions has been observed in $\bar{\Lambda}$-nucleus of different mass regions, including $^{16}$O+$\bar{\Lambda}$, $^{40}$Ca+$\bar{\Lambda}$ and $^{208}$Pb+$\bar{\Lambda}$. It indicates that the spin symmetry in anti-lambda-nucleus systems is still good irrespective of the tensor coupling.

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