Covariant propagator and chiral power counting

被引：1
|
作者：
Liu, Zhou [1 ]
Wen, Li-Hong [1 ]
Yang, Ji-Feng [1 ]
机构：
[1] East China Normal Univ, Sch Phys & Elect Sci, Shanghai 200241, Peoples R China
来源：
NUCLEAR PHYSICS B | 2021年 / 963卷
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1016/j.nuclphysb.2020.115288
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
Some one-loop diagrams with one and two external baryons/nucleons are revisited using covariant baryon propagators in chiral effective theory. We showed that it is enough to separate and subtract all the local terms that violate chiral power counting to recover chiral power counting, no need to introduce extra operations. The structures of leading chiral corrections and IR enhancement or threshold effects are 'stable' or persist as long as covariant propagators are employed for all particles. (C) 2020 The Author(s). Published by Elsevier B.V.
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页数：13
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