7,663 research outputs found
The European Muon Collaboration effect from short-range correlated nucleons in a nucleon swelling model
The relation between the nuclear EMC effect and the nucleon-nucleon
short-range correlation is a hot topic in high-energy nuclear physics, ever
since a peculiar linear correlation between these two phenomena discovered. In
this paper, the contribution to the nuclear EMC effect arising from the
short-range correlated nucleons is examined in a nucleon-swelling model. We
find that the structure modifications of the N-N SRC nucleons reproduce more or
less the measured EMC ratios of light nuclei, while they are not enough to
explain the measured EMC ratios of heavy nuclei. We speculate that the
hypothesis of causal connection between SRC and the EMC effect is not exact, or
the universality of the inner structure of SRC nucleon is violated noticeably
from light to heavy nuclei, or the mean-field nucleons are also modified.Comment: 7 pages, 4 figures. arXiv admin note: text overlap with
arXiv:2207.1098
The European Muon Collaboration effect from short-range correlated nucleons in a -rescaling model
In this paper, we examine the hypothesis that the nuclear EMC effect comes
merely from the N-N SRC pairs inside the nucleus and that the properties of N-N
SRC pair are universal among the various nuclei, using the conventional
-rescaling model for the EMC effect. With the previously determined
effective mass of the short-range correlated nucleon and the number of N-N SRC
pairs estimated, we calculate the EMC effect of various nuclei within the
-rescaling approach. From our calculations, the nuclear EMC effect due to
the mass deficits of the SRC nucleons is not enough to reproduce the observed
EMC effect in experiments. We speculate that the internal structure of the
mean-field single nucleon is also obviously modified, or there are more origins
of the EMC effect beyond the N-N SRC configuration (such as the
cluster), or the universality of N-N SRC pair is violated noticeably from light
to heavy nuclei.Comment: 7 pages, 4 figure
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