A=3(e,e')xB≥1 cross-section ratios and the isospin structure of short-range correlations

Schmidt, A.; Denniston, A. W.; Seroka, E. M.; Barnea, N.; Higinbotham, D. W.; Korover, I.; Miller, G. A.; Piasetzky, E.; Strikman, M.; Weinstein, L. B.; Weiss, R.; Hen, O.

doi:10.1103/physrevc.109.054001

Title: A = 3 ( e , e ' ) x B ≥ 1 cross-section ratios and the isospin structure of short-range correlations

Journal Article · 01 May 2024 · Physical Review. C

DOI: https://doi.org/10.1103/physrevc.109.054001 · OSTI ID:2396601

^[1]; Denniston, A. W. ^[2];

^[1]; Barnea, N. ^[3];

^[4]; Korover, I. ^[2]; Miller, G. A. ^[5]; Piasetzky, E. ^[6]; Strikman, M. ^[7];

^[8];

^[9]; Hen, O. ^[2]

George Washington Univ., Washington, DC (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Hebrew Univ. of Jerusalem (Israel). Racah Inst. of Physics
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Univ. of Washington, Seattle, WA (United States)
Tel Aviv Univ., Tel Aviv (Israel)
Pennsylvania State Univ., University Park, PA (United States)
Old Dominion Univ., Norfolk, VA (United States)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

We study the relation between measured high-x_B, 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 (SRC) nucleon pairs in three-body (A=3) nuclei. In this study, analysis of this 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 (GCF) 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 wavefunction for hydrogen-3 and helium-3."

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program; Israeli Science Foundation (ISF); Pazy Foundation

Grant/Contract Number:: SC0016583; SC0020240; FG02-96ER40960; FG02-93ER40771; FG02-97ER41014

OSTI ID:: 2396601

Report Number(s):: JLAB-PHY--24-4110; arXiv:2402.08199; DOE/OR/23177--7551

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Journal Issue: 5 Vol. 109; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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