四川大学学报（自然科学版）2025，Vol.62Issue(2)：458-464,7.DOI:10.19907/j.0490-6756.240147
两体手征核力中∆共振态对核子-核子散射分波相移的影响
The impact of ∆-resonance in two-body chiral nuclear force on the partial wave phase shift of nucleon-nucleon scattering
摘要
Abstract
Based on the framework of chiral effective field theory,we perturbatively calculated the nucleon-nucleon scattering phase shifts for partial waves with orbital angular momentum L≥1(except for 3P0)by con-sidering the effect of ∆-resonance.The aim was to explore whether the ∆-resonance plays a non-negligible role in two-body chiral nuclear force.By comparing with the scattering phase shift data with and without the effect of ∆-resonance,we found that the ∆-resonance in the two-body chiral nuclear forces can make the phase shift result of peripheral partial waves with angular momentum L≥2 fit better with the empirical val-ues,but also the P waves,which were poorly regarded previously,also showed consistency with the empiri-cal value of phase shift and good convergence properties.This highlights the necessity of considering the ∆-resonance in two-body chiral nuclear forces.On the other hand,through the analysis and comparison of ana-lytical expressions and theoretical scattering phase shifts on 1D2 and 3D2,we also found the relationship be-tween two regularization methods for loop integration that dimensional regularization is an extreme case when the internal cutoff in the specific function regularization with the internal cutoff set to infinity.关键词
手征核力/∆共振态/核子-核子散射/散射相移Key words
Chiral nuclear force/∆-resonance/Nucleon-nucleon scattering/Scattering phase shift分类
数理科学引用本文复制引用
陈海明,龙炳蔚..两体手征核力中∆共振态对核子-核子散射分波相移的影响[J].四川大学学报（自然科学版）,2025,62(2):458-464,7.基金项目
国家自然科学基金面上项目(12275185) （12275185）
