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Effective field theory for triaxially deformed nuclei

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Abstract.

Effective field theory is generalized to investigate the rotational motion of triaxially deformed even-even nuclei. The Hamiltonian for the triaxial rotor is obtained up to next-to-leading order within the effective field theory formalism. Its applicability is examined by comparing with a five-dimensional rotor-vibrator Hamiltonian for the description of the energy spectra of the ground state and \( \gamma\) band in Ru isotopes. It is found that by taking into account the next-to-leading order corrections, the ground state band in the whole spin region and the \( \gamma\) band in the low spin region are well described. The deviations for high-spin states in the \( \gamma\) bands point towards the importance of including vibrational degrees of freedom in the effective field theory formulation.

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Author information

Authors and Affiliations

  1. Physik-Department, Technische Universität Müchen, D-85747, Garching, Germany

    Q. B. Chen & N. Kaiser

  2. State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, 100871, Beijing, China

    Q. B. Chen & J. Meng

  3. Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn, D-53115, Bonn, Germany

    Ulf-G. Meißner

  4. Institute for Advanced Simulation, Institut für Kernphysik, Jülich Center for Hadron Physics and JARA-HPC, Forschungszentrum Jülich, D-52425, Jülich, Germany

    Ulf-G. Meißner

  5. School of Physics and Nuclear Energy Engineering, Beihang University, 100191, Beijing, China

    J. Meng

  6. Department of Physics, University of Stellenbosch, Stellenbosch, South Africa

    J. Meng

Authors
  1. Q. B. Chen
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  2. N. Kaiser
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  3. Ulf-G. Meißner
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  4. J. Meng
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Corresponding author

Correspondence to Q. B. Chen.

Additional information

Communicated by D. Blaschke

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Chen, Q.B., Kaiser, N., Meißner, UG. et al. Effective field theory for triaxially deformed nuclei. Eur. Phys. J. A 53, 204 (2017). https://doi.org/10.1140/epja/i2017-12404-5

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  • DOI: https://doi.org/10.1140/epja/i2017-12404-5

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