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 -