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arXiv 2008.13256nucl-th
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重形变核的SU(3)谱简并破缺

Breaking SU(3) spectral degeneracies in heavy deformed nuclei

Dennis Bonatsos, I. E. Assimakis, Andriana Martinou, S. Peroulis, S. Sarantopoulou, N. Minkov

摘要:

对称性在自然界中通过物理系统光谱的简并性表现出来。在重变形核的情况下,当在相互作用玻色子模型的框架中描述时,其中相关的质子(中子)对被近似为玻色子,基态带没有对称伙伴,而第一激发的β和γ带之间的简并性通过使用三体和/或四体项被打破。在近似SU(3)对称的代理SU(3)模型框架下,同样的三体和/或四体算符被用来破坏基态带和第一激发γ带之间的简并性。在后一种情况下,指出了实验上可获得的与任何自由参数无关的量。

英文摘要:

Symmetries are manifested in nature through degeneracies in the spectra of physical systems. In the case of heavy deformed nuclei, when described in the framework of the Interacting Boson Model, within which correlated proton (neutron) pairs are approximated as bosons, the ground state band has no symmetry partner, while the degeneracy between the first excited beta and gamma bands is broken through the use of three-body and/or four-body terms. In the framework of the proxy-SU(3) model, in which an approximate SU(3) symmetry of fermions is present, the same three-body and/or four-body operators are used for breaking the degeneracy between the ground state band and the first excited gamma band. Experimentally accessible quantities being independent of any free parameters are pointed out in the latter case.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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