The Triaxial Dynamic In The Interacting Boson Model Induced By The Q-cubic Term

In this work, the finite-N dynamics in the interacting boson model around the triaxialdeformation induced by Q-cubic have been investigated. Through the classical analysis of theHamiltonian involving the Q-cubic term, it can be found that the stably triaxial deformation,which cannot be realized in the traditional Hamiltonian up to two-body terms, can be inducedby the Q-cubic term in large-N limit. Accordingly, we have numerically solved the interactingboson model Hamiltonian with different parameter values through a diagonalization schemeto obtain the excitation energies and E2transitional rate, based on which we havesystematically studied the dynamical characteristic of the triaxial deformation in the finite-Ncases.