期刊
FRONTIERS IN PHYSICS
卷 8, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fphy.2020.00079
关键词
effective field theory; renormalization; nuclear physics; singular potentials; pion exchange
资金
- U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-FG02-04ER41338]
- European Union Research and Innovation program Horizon 2020 [654002]
Ever since quantum field theory was first applied to the derivation of nuclear forces in the mid-twentieth century, the renormalization of pion exchange with realistic couplings has presented a challenge. The implementation of effective field theories (EFTs) in the 1990s promised a solution to this problem but unexpected obstacles were encountered. The response of the nuclear community has been to focus on chiral potentials with regulators chosen to produce a good description of data. Meanwhile, a successful EFT without explicit pion exchange-Pionless EFT-has been formulated where renormalization is achieved order by order in a systematic expansion of low-energy nuclear observables. I describe how lessons from Pionless EFT are being applied to the construction of a properly renormalized Chiral EFT.
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