期刊
CHINESE PHYSICS C
卷 45, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1674-1137/abccab
关键词
nucleon mass; nucleon-nucleon short-range correlation; quasielastic scattering
资金
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB34030301]
- National Science Foundation China [11305007]
The properties and structure of nucleons can be modified by short-range correlations (SRC) among nucleons. By analyzing SRC ratio data, researchers have extracted the mass of a nucleon in an SRC pair and the expected number of pn-SRC pairs in deuterium. The mass deficit of the strongly overlapping nucleon can be explained by the trace anomaly contribution to the mass in QCD or alternatively by the vacuum energy in the MIT bag model.
Nucleon properties and structure should be modified by short-range correlations (SRC) among nucleons. By analyzing SRC ratio data, we extract the mass of a nucleon in an SRC pair and the expected number of pn-SRC pairs in deuterium, under the assumption that the SRC nucleon mass is universal for different nuclei. The nucleon mass of a two-nucleon SRC pair is m(SRC) = 852 +/- 18 MeV, and the number of pn-SRC pairs in deuterium is n(SRC)(d) =0.021 +/- 0.005. The mass deficit of the strongly overlapping nucleon can be explained by the trace anomaly contribution to the mass in QCD or alternatively by the vacuum energy in the MIT bag model.
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