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arXiv · 2508.15414

B(E2) anomaly and triaxial deformation within a two-fluid SU(3) symmetry

Wei Teng·Sheng Nan Wang·Yu Zhang·Xian Zhi Zhao·Xi Deng·Xiao Tong Li
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Abstract

The correlation between $B(E2)$ structure and triaxial deformation has been investigated within the framework of the proton-neutron boson model. The analysis reveals that the distinctive feature, characterized by $B(E2;4_1^+\rightarrow2_1^+)/B(E2;2_1^+\rightarrow0_1^+)<1.0$ along with $E(4_1^+)/E(2_1^+)>2.0$, can emerge from the triaxial SU(3) symmetry inherent in two-fluid boson systems, attributed to band-mixing effects. This suggests a symmetry-based understanding of the anomalous $E2$ transitions observed in experiments.

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Wei Teng, Sheng Nan Wang, Yu Zhang, Xian Zhi Zhao, Xi Deng, Xiao Tong Li. 2025-08-21. B(E2) anomaly and triaxial deformation within a two-fluid SU(3) symmetry. https://doi.org/10.1088/1674-1137%2Fadcd4a

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