Comparing Proton Momentum Distributions in A = 2 and 3 Nuclei Via ²H ³H and ³He (e,e′p) Measurements

Authors

R. Cruz-Torres
F. Hauenstein, Old Dominion UniversityFollow
A. Schmidt
D. Nguyen
D. Abrams
H. Albataineh
S. Alsalmi
D. Androic
K. Aniol
W. Armstrong
J. Arrington
H. Atac
D. Bulumulla
C. E. Hyde, Old Dominion UniversityFollow
V. Khachatryan, Old Dominion University
M. N.H. Rashad, Old Dominion University
L. B. Weinstein, Old Dominion UniversityFollow
Z. Y. Ye
J. Zhang
Jefferson Lab Hall A Tritium Collaboration

Document Type

Article

Publication Date

10-2019

DOI

10.1016/j.physletb.2019.134890

Publication Title

Physics Letters B

Volume

797

Pages

134890 (7 pg.)

Abstract

We report the first measurement of the (e, e' p) reaction cross-section ratios for Helium-3 (³He), Tritium (³H), and Deuterium (d). The measurement covered a missing momentum range of 40 ≤ p_miss ≤ 550 MeV/c, at large momentum transfer ({Q²} ≈ 1.9 (GeV/c)²) and x_B > 1, which minimized contributions from non quasi-elastic (QE) reaction mechanisms. The data is compared with planewave impulse approximation (PWIA) calculations using realistic spectral functions and momentum distributions. The measured and PWIA-calculated cross-section ratios for ³He/d and ³H/d extend to just above the typical nucleon Fermi-momentum (k_F ≈ 250 MeV/c) and differ from each other by ∼ 20%, while for ³He/³H they agree within the measurement accuracy of about 3%. At momenta above k_F , the measured ³He/³H ratios differ from the calculation by 20% −50%. Final state interaction (FSI) calculations using the generalized Eikonal Approximation indicate that FSI should change the ³He/³H cross-section ratio for this measurement by less than 5%. If these calculations are correct, then the differences at large missing momenta between the ³He/³H experimental and calculated ratios could be due to the underlying NN interaction, and thus could provide new constraints on the previously loosely-constrained short-distance parts of the NN interaction.

Comments

© 2019 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license. Funded by SCOAP³.

Original Publication Citation

Cruz-Torres, R., Li, S., Hauenstein, F., Schmidt, A., Nguyen, D., Abrams, D., . . . Zhang, J. (2019). Comparing proton momentum distributions in A=2 and 3 nuclei via ²H ³H and ³He (e, e ' p) measurements. Physics Letters B, 797, 134890, 134891-134897. doi:10.1016/j.physletb.2019.134890

ORCID

0000-0001-7282-8120 (Hyde), 0000-0001-5416-2900 (Weinstein)

Repository Citation

Cruz-Torres, R.; Hauenstein, F.; Schmidt, A.; Nguyen, D.; Abrams, D.; Albataineh, H.; Alsalmi, S.; Androic, D.; Aniol, K.; Armstrong, W.; Arrington, J.; Atac, H.; Bulumulla, D.; Hyde, C. E.; Khachatryan, V.; Rashad, M. N.H.; Weinstein, L. B.; Ye, Z. Y.; Zhang, J.; and Jefferson Lab Hall A Tritium Collaboration, "Comparing Proton Momentum Distributions in A = 2 and 3 Nuclei Via ²H ³H and ³He (e,e′p) Measurements" (2019). Physics Faculty Publications. 405.
https://digitalcommons.odu.edu/physics_fac_pubs/405