Observation of large missing-momentum (π,πβ²β’π) cross-section scaling and the onset of correlated-pair dominance in nuclei
DOI
10.1103/PhysRevC.107.L061301
Abstract
We report the measurement of xB scaling in (e, eβ² 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, eβ² ) cross-section ratios. The xB -integrated cross-section ratios become constant (i.e., scale) beginning at pmiss β 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 < kF , and suggest a potential non-negligible contribution to the measured cross-section ratios from scattering off single, uncorrelated, nucleons up to pmiss β 350 MeV/c. Therefore, SRCs become dominant in nuclei at pmiss β 350 MeV/c, well above the nuclear Fermi SurfaceofkF β250MeV/c.
Document Type
Article
Publication Date
5-26-2023
Publisher Statement
Β©2023 American Physical Society
Recommended Citation
Korover, I., et al. (2023). Observation of large missing-momentum (e,e'p) crosssection~scaling and the onset of correlated-pair dominance in nuclei. Phys. Rev. C, 107, article L061301. DOI: https://doi.org/10.1103/PhysRevC.107.L061301