TY - JOUR
T1 - A=3(e,e′) xB≥1 cross-section ratios and the isospin structure of short-range correlations
AU - Schmidt, A.
AU - Denniston, A. W.
AU - Seroka, E. M.
AU - Barnea, N.
AU - Higinbotham, D. W.
AU - Korover, I.
AU - Miller, G. A.
AU - Piasetzky, E.
AU - Strikman, M.
AU - Weinstein, L. B.
AU - Weiss, R.
AU - Hen, O.
N1 - Publisher Copyright:
© 2024 American Physical Society.
PY - 2024/5
Y1 - 2024/5
N2 - We study the relation between measured high-xB, high-Q2, helium-3 to tritium, (e,e′) inclusive-scattering cross-section ratios and the relative abundance of high-momentum neutron-proton (np) and proton-proton (pp) short-range correlated nucleon pairs in three-body (A=3) nuclei. Analysis of these data using a simple pair-counting cross-section model suggested a much smaller np/pp ratio than previously measured in heavier nuclei, questioning our understanding of A=3 nuclei and, by extension, all other nuclei. Here, we examine this finding using spectral-function-based cross-section calculations, with both an ab initio A=3 spectral function and effective generalized contact formalism spectral functions using different nucleon-nucleon interaction models. The ab initio calculation agrees with the data, showing good understanding of the structure of A=3 nuclei. An 8% uncertainty on the simple pair-counting model, as implied by the difference between it and the ab initio calculation, gives a factor of 5 uncertainty in the extracted np/pp ratio. Thus we see no evidence for the claimed "unexpected structure in the high-momentum wave function for hydrogen-3 and helium-3".
AB - We study the relation between measured high-xB, high-Q2, helium-3 to tritium, (e,e′) inclusive-scattering cross-section ratios and the relative abundance of high-momentum neutron-proton (np) and proton-proton (pp) short-range correlated nucleon pairs in three-body (A=3) nuclei. Analysis of these data using a simple pair-counting cross-section model suggested a much smaller np/pp ratio than previously measured in heavier nuclei, questioning our understanding of A=3 nuclei and, by extension, all other nuclei. Here, we examine this finding using spectral-function-based cross-section calculations, with both an ab initio A=3 spectral function and effective generalized contact formalism spectral functions using different nucleon-nucleon interaction models. The ab initio calculation agrees with the data, showing good understanding of the structure of A=3 nuclei. An 8% uncertainty on the simple pair-counting model, as implied by the difference between it and the ab initio calculation, gives a factor of 5 uncertainty in the extracted np/pp ratio. Thus we see no evidence for the claimed "unexpected structure in the high-momentum wave function for hydrogen-3 and helium-3".
UR - http://www.scopus.com/inward/record.url?scp=85192200847&partnerID=8YFLogxK
U2 - 10.1103/physrevc.109.054001
DO - 10.1103/physrevc.109.054001
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AN - SCOPUS:85192200847
SN - 2469-9985
VL - 109
JO - Physical Review C
JF - Physical Review C
IS - 5
M1 - 054001
ER -