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Unexpected Rise in Nuclear Collectivity from Short-Range Physics
Kevin S Becker1, Kristina D Launey1, Andreas Ekström2
1Louisiana State University, Department of Physics and Astronomy, Baton Rouge, Louisiana 70803, USA.
Physical Review Letters
|January 30, 2026
Summary
We found that short-range nucleon interactions surprisingly influence collective nuclear motion, affecting quadrupole collectivity in light nuclei like Lithium-6 and Carbon-12. This challenges traditional views linking collectivity solely to long-range correlations.
Area of Science:
- Nuclear Physics
- Quantum Chromodynamics
- Atomic Nuclei
Background:
- Collective nuclear motion is typically attributed to long-range correlations.
- Understanding the interplay between short-range and long-range forces in nuclei is crucial.
Purpose of the Study:
- To investigate the influence of short-range nucleon-nucleon interactions on collective nuclear motion.
- To explore the origins of emergent nuclear collectivity in light nuclei.
Main Methods:
- Utilized state-of-the-art ab initio techniques for nuclear calculations.
- Analyzed quadrupole collectivity in low-lying states of Lithium-6 and Carbon-12.
Main Results:
- Discovered a significant influence of short-range S-wave contact couplings on quadrupole collectivity.
- Observed that these couplings subtly alter surface oscillations without changing the overall nuclear shape contribution.
- Identified opposing effects of two S-wave contact couplings.
Conclusions:
- Nuclear collectivity is not solely driven by long-range correlations but is also significantly impacted by short-range nucleon-nucleon interactions.
- Provides new insights into the emergence of nuclear collectivity and its fundamental link to short-distance nuclear forces.
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