Probing Few-Body Nuclear Dynamics via ³H and ³He (e e'p) pn Cross-Section Measurements

Authors

R. Cruz-Torres
F. Hauenstein, Old Dominion University
D. Bulumulla, Old Dominion University
C. Hyde, Old Dominion UniversityFollow
M. Khachatryan, Old Dominion UniversityFollow
M.N.H. Rashad, Old Dominion University
L.B. Weinstein, Old Dominion UniversityFollow
Et. Al.
Jefferson Lab Hall A. Tritium Collaboration

Document Type

Article

Publication Date

2020

DOI

10.1103/PhysRevLett.124.212501

Publication Title

Physical Review Letters

Volume

124

Issue

21

Pages

212501 (1-8)

Abstract

We report the first measurement of the (e, e'p) three-body breakup reaction cross sections in helium-3 (³He) and tritium (³H) at large momentum transfer [< Q²> ≈ 1.9 (GeV/c)²] and x_B> 1 kinematics, where the cross section should be sensitive to quasielastic (QE) scattering from single nucleons. The data cover missing momenta 40 ≤ p_miss ≤ 500 MeV/c that, in the QE limit with no rescattering, equals the initial momentum of the probed nucleon. The measured cross sections are compared with state-of-the-art ab initio calculations. Overall good agreement, within ± 20%, is observed between data and calculations for the full p_miss range for ³H and for 100 ≤ p_miss ≤ 350 MeV/c for ³He. Including the effects of rescattering of the outgoing nucleon improves agreement with the data at p_miss > 250 MeV/c and suggests contributions from charge-exchange (SCX) rescattering. The isoscalar sum of ³He plus ³H, which is largely insensitive to SCX, is described by calculations to within the accuracy of the data over the entire p_miss range. This validates current models of the ground state of the three-nucleon system up to very high initial nucleon momenta of 500 MeV/c.

Comments

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Original Publication Citation

Cruz-Torres, R., Nguyen, D., Hauenstein, F., Schmidt, A., Li, S., Abrams, D., . . . Jefferson Lab Hall, A. T. C. (2020). Probing few-body nuclear dynamics via ³H and ³He (e e'p) pn cross-section measurements. Physical Review Letters, 124(21), 212501. doi:10.1103/PhysRevLett.124.212501

ORCID

0000-0001-7282-8120 (Hyde)

Repository Citation

Cruz-Torres, R.; Hauenstein, F.; Bulumulla, D.; Hyde, C.; Khachatryan, M.; Rashad, M.N.H.; Weinstein, L.B.; Al., Et.; and Jefferson Lab Hall A. Tritium Collaboration, "Probing Few-Body Nuclear Dynamics via ³H and ³He (e e'p) pn Cross-Section Measurements" (2020). Physics Faculty Publications. 429.
https://digitalcommons.odu.edu/physics_fac_pubs/429