Observation of Large Missing-Momentum (e, e' p) Cross-Section Scaling and the Onset of Correlated-Pair Dominance in Nuclei

Authors

I. Korover
A. W. Denniston
A. Kiral
A. Schmidt
A. Lovato
N. Rocco
A. Nikolakopoulos
L. B. Weinstein, Old Dominion UniversityFollow
E. Piasetzky
O. Hen
M. J. Amaryan, Old Dominion UniversityFollow
Giovanni Angelini
H. Atac
N. A. Baltzell
L. Barion
M. Battaglieri
I. Bedlinskiy
Fatiha Benmokhtar
A. Bianconi
Z. W. Zhao
et al.
CLAS Collaboration

Document Type

Article

Publication Date

2023

DOI

10.1103/PhysRevC.107.L061301

Publication Title

Physical Review C

Volume

107

Issue

6

Pages

L061301 (1-7)

Abstract

We report the measurement of 𝒙_B scaling in (e,e′p) cross-section ratios off nuclei relative to deuterium at large missing momentum of 350 ≤ _Pmiss ≤ 600 MeV/c. The observed scaling extends over a kinematic range of 0.7 ≤ 𝒙_B ≤ 1.8, which is significantly wider than 1.4 ≤ 𝒙_B ≤ 1.8 previously observed for inclusive (e,e′) cross-section ratios. The 𝒙_B-integrated cross-section ratios become constant (i.e., scale) beginning at p_miss ≈ kF, the nuclear Fermi momentum. Comparing with theoretical calculations we find good agreement with generalized contact formalism calculations for high missing momentum (>375 MeV /c), suggesting the observed scaling results from interacting with nucleons in short-range correlated (SRC) pairs. For low missing momenta, mean-field calculations show good agreement with the data for p_miss < k_F, and suggest a potential non-negligible contribution to the measured cross-section ratios from scattering off single, uncorrelated, nucleons up to p_miss ≈ 350 MeV /c. Therefore, SRCs become dominant in nuclei at p_miss ≈ 350 MeV /c, well above the nuclear Fermi Surface of k_F ≈ 250 MeV/c.

Rights

© 2023 American Physical Society

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Original Publication Citation

Korover, I., Denniston, A. W., Kiral, A., Schmidt, A., Lovato, A., Rocco, N., Nikolakopoulos, A., Weinstein, L. B., Piasetzky, E., Hen, O., Amaryan, M. J., Angelini, G., Atac, H., Baltzell, N. A., Barion, L., Battaglieri, M., Bedlinskiy, I., Benmokhtar, F., Bianconi, A., ... Zhao, Z. W. (2023). Observation of large missing-momentum (e, e' p) cross-section scaling and the onset of correlated-pair dominance in nuclei. Physical Review C, 107(6), 1-7, Article L061301. https://doi.org/10.1103/PhysRevC.107.L061301

ORCID

0000-0001-5416-2900 (Weinstein), 0000-0002-4136-2572 (Bulumulla), 0000-0003-2086-2807 (Hattawy), 0000-0001-7282-8120 (Hyde), 0000-0002-3598-4594 (Pandey), 0000-0001-6345-2360 (Poudel)

Repository Citation

Korover, I.; Denniston, A. W.; Kiral, A.; Schmidt, A.; Lovato, A.; Rocco, N.; Nikolakopoulos, A.; Weinstein, L. B.; Piasetzky, E.; Hen, O.; Amaryan, M. J.; Angelini, Giovanni; Atac, H.; Baltzell, N. A.; Barion, L.; Battaglieri, M.; Bedlinskiy, I.; Benmokhtar, Fatiha; Bianconi, A.; Zhao, Z. W.; et al.; and CLAS Collaboration, "Observation of Large Missing-Momentum (e, e' p) Cross-Section Scaling and the Onset of Correlated-Pair Dominance in Nuclei" (2023). Physics Faculty Publications. 799.
https://digitalcommons.odu.edu/physics_fac_pubs/799