We report the measurement of xB 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≤xB≤1.8, which is significantly wider than 1.4≤xB≤1.8 previously observed for inclusive (e,e′) cross-section ratios. The xB-integrated cross-section ratios become constant (i.e., scale) beginning at pmiss≈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 pmiss
Korover, I., Denniston, A.w., Kiral, A., Schmidt, A., Lovato, A., Rocco, N., et al. (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) [10.1103/physrevc.107.l061301].
Observation of large missing-momentum (e,e′p) cross-section scaling and the onset of correlated-pair dominance in nuclei
D'Angelo, A.
Writing – Review & Editing
;Lanza, L.
Writing – Review & Editing
;Rizzo, A.
Membro del Collaboration Group
;
2023-01-01
Abstract
We report the measurement of xB 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≤xB≤1.8, which is significantly wider than 1.4≤xB≤1.8 previously observed for inclusive (e,e′) cross-section ratios. The xB-integrated cross-section ratios become constant (i.e., scale) beginning at pmiss≈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 pmiss| File | Dimensione | Formato | |
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PhysRevC.107.L061301.pdf
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