Accurate Relativistic Chiral Nucleon-Nucleon Interaction up to Next-to-Next-to-Leading Order

Area of Science:

• Nuclear Physics
• Quantum Chromodynamics

Background:

• Accurate nucleon-nucleon interactions are essential for understanding nuclear structure and reactions.
• Existing models require improved descriptions, especially at higher energies.

Purpose of the Study:

• To construct a relativistic chiral nucleon-nucleon interaction up to the next-to-next-to-leading order.
• To provide essential inputs for relativistic ab initio studies of nuclear systems.

Main Methods:

• Utilizing covariant baryon chiral perturbation theory.
• Developing a relativistic chiral potential for nucleon-nucleon interactions.

Main Results:

• Achieved a good description of np phase shifts up to T_{lab}=200 MeV and higher with χ[over ˜]^{2}/d.o.f. < 1.
• Demonstrated satisfactory convergence and improved behavior at higher energies with the next-to-next-to-leading-order interaction.

Conclusions:

• The developed relativistic chiral potential offers a significant advancement for nuclear structure and reaction studies.
• This interaction fills a long-standing need in relativistic ab initio calculations.