Renormalization of one-pion exchange in higher partial waves in chiral effective field theory for antinucleon-nucleon system  

作　　者：周大任 Daren Zhou(School of Electrical and Computer Engineering,Nanfang College,Guangzhou,Guangdong 510970,China)

机构地区：[1]School of Electrical and Computer Engineering,Nanfang College,Guangzhou,Guangdong 510970,China

出　　处：《Chinese Physics C》2023年第3期154-168,共15页中国物理C（英文版）

基　　金：Supported by the Doctoral Fund Project of Nanfang College,Guangzhou(2020BQ03)。

摘　　要：The renormalization of the iterated onepion exchange(OPE)has been studied in chiral effective field theory(χEFT)for the antinucleon-nucleon(NN)scattering in some partial waves(Phys.Rev.C 105,054005(2022)).In this paper,we go further for the other higher partial waves but with total angular momenta J≤3.Contact interactions are represented by a complex spherical well in the coordinate space.Changing the radius of the spherical well means changing the cutoff.We check the cutoff dependence of the phase shifts,inelasticities,and mixing angles for the partial waves and show that contact interactions are needed at leading order in channels where the singular tensor potentials of OPE are attractive.The results are compared with the energy-dependent partial-wave analysis of NN scattering data.Comparisons between our conclusions and applications of χEFT to the nucleon-nuc-leon system are also discussed.

关 键 词：RENORMALIZATION chiral effective field theory antinucleon-nucleon scattering 

分 类 号：O412.3[理学—理论物理]