期刊
ANNALS OF PHYSICS
卷 378, 期 -, 页码 317-395出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.aop.2017.01.021
关键词
Chiral effective field theory; Nuclear current; Electroweak processes
资金
- DFG [SFB/TR 110]
- BMBF [05P2015-NUSTAR RD]
- National Science Foundation [NSF PHY11-25915]
- Chinese Academy of Sciences (CAS) President's International Fellowship Initiative (PIFI) [2015VMA076]
We present the complete derivation of the nuclear axial charge and current operators as well as the pseudoscalar operators to fourth order in the chiral expansion relative to the dominant one-body contribution using the method of unitary transformation. We demonstrate that the unitary ambiguity in the resulting operators can be eliminated by the requirement of renormalizability and by matching of the pion-pole contributions to the nuclear forces. We give expressions for the renormalized single-, two and three-nucleon contributions to the charge and current operators and pseudoscalar operators including the relevant relativistic corrections. We also verify explicitly the validity of the continuity equation. (C) 2017 Elsevier Inc. All rights reserved.
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