Publications
Publication Information
| Title | Direct Observation of Proton-Neutron Short-Range Correlation Dominance in Heavy Nuclei |
| Authors | Meytal Duer, Axel Schmidt, Jackson Pybus, Efrain Segarra, Andrew Denniston, R. Weiss, O. Hen, Eliazer Piasetzky, Lawrence Weinstein, N. Barnea, Igor Korover, Erez Cohen, Hayk Hakobyan |
| JLAB number | JLAB-PHY-19-2926 |
| LANL number | arXiv:1810.05343 |
| Other number | DOE/OR/23177-4677 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
|
Journal Compiled for Physical Review Letters Volume 122 Page(s) 172502 Refereed | |
| Publication Abstract: | We measured the triple coincidence A(e,e'np) and A(e,e'pp) reactions on carbon, aluminum, iron, and lead targets at Q2 > 1.5 (GeV/c)2, xB > 1.1 and missing momentum > 400 MeV/c. This was the first direct measurement of both proton-proton (pp) and neutron-proton (np) short-range correlated (SRC) pair knockout from heavy asymmetric nuclei. For all measured nuclei, the average proton-proton (pp) to neutron-proton (np) reduced cross-section ratio is about 6%, in agreement with previous indirect measurements. Correcting for Single-Charge Exchange effects decreased the SRC pairs ratio to ~ 3%, which is lower than previous results. Comparisons to theoretical Generalized Contact Formalism (GCF) cross-section calculations show good agreement using both phenomenological and chiral nucleon-nucleon potentials, favoring a lower pp to np pair ratio. The ability of the GCF calculation to describe the experimental data using either phenomenological or chiral potentials suggests possible reduction of scale- and scheme-dependence in cross section ratios. Our results also support the high-resolution description of high-momentum states being predominantly due to nucleons in SRC pairs. |
| Experiment Numbers: | |
| Group: | Hall B |
| Document: | |
| DOI: | https://doi.org/10.1103/PhysRevLett.122.172502 |
| Accepted Manuscript: | 1810.05343.pdf |
| Supporting Documents: | |
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