Cutoff regulators in chiral nuclear effective field theory

被引：8
|
作者：
Long, Bingwei [1 ]
Mei, Ying [1 ]
机构：
[1] Sichuan Univ, Dept Phys, Ctr Theoret Phys, 29 Wang Jiang Rd, Chengdu 610064, Sichuan, Peoples R China
来源：
PHYSICAL REVIEW C | 2016年 / 93卷 / 04期
基金：
中国国家自然科学基金;
关键词：
PHENOMENOLOGICAL LAGRANGIANS; FORCES;
D O I：
10.1103/PhysRevC.93.044003
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Three-dimensional cutoff regulators are frequently employed in multinucleon calculations, but they violate chiral symmetry and Lorentz invariance. A cutoff regularization scheme is proposed to compensate systematically at subleading orders for these symmetry violations caused by regulator artifacts. This is especially helpful when a soft momentum cutoff has to be used for technical reasons. It is also shown that dimensional regularization can still be used for some Feynman (sub)diagrams while cutoff regulators are used for the rest.
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页数：5
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