¹² C(e,e'pN) Measurements of Short Range Correlations in the Tensor-to-Scalar Interaction Transition Region

Authors

I. Korover
J. R. Pybus
A. Schmidt
F. Hauenstein, Old Dominion UniversityFollow
M. Duer
L. B. Weinstein, Old Dominion UniversityFollow
M. J. Amaryan, Old Dominion UniversityFollow
D. Bullumulla, Old Dominion UniversityFollow
M. Hattawy, Old Dominion UniversityFollow
X. Zheng
et al.
The CLAS Collaboration

Document Type

Article

Publication Date

2021

DOI

10.1016/j.physletb.2021.136523

Publication Title

Physics Letters B

Volume

820

Pages

136523 (1-6)

Abstract

High-momentum configurations of nucleon pairs at short-distance are probed using measurements of the ¹²C(e,'p) and ¹²C (e,e'pN) reactions (where N is either n or p), at high Q² and 𝒙_B > 1.1. The data span a missing-momentum range of 300-1000 MeV/c and are predominantly sensitive to the transition region of the strong nuclear interaction from a tensor to scalar interaction. The data are well reproduced by theoretical calculations using the generalized contact formalism with both chiral and phenomenological nucleon-nucleon (NN) interaction models. This agreement suggests that the measured high missing-momentum protons up to 1000 MeV/c predominantly belong to short-ranged correlated (SRC) pairs. The measured ¹²C (e, e'pN/¹²C(e, e'p) and ¹²C(e, e'pp)/¹²C(e,e'pn) cross-section ratios are consistent with a decrease in the fraction of proton-neutron SRC pairs and increase in the fraction of proton-proton SRC pairs with increasing missing momentum. This confirms the transition from an isospin-dependent tensor NN interaction at ~400 MeV/c to an isospin-independent scalar interaction at high-momentum around ~800 MeV/c as predicted by theoretical calculation.

Comments

© 2021 The Authors.

This is an open access article under the Creative Commons Attribution 4.0 International (CC BY 4.0) License. Funded by SCOAP³.

Original Publication Citation

Korover, I., Pybus, J.R., Schmidt, A., Hauenstein, F., Duer, M., ... Zheng, X. (2021) ¹² C(e,e'pN) measurements of short range correlations in the tensor-to-scalar interaction transition region. Physics Letters B. 820, 1-6, Article 136523. https://doi.org/10.1016/j.physletb.2021.136523

ORCID

0000-0002-1265-2212 (Hauenstein), 0000-0001-5416-2900 (Weinstein), 0000-0002-4136-2572 (Bulumulla)

Repository Citation

Korover, I.; Pybus, J. R.; Schmidt, A.; Hauenstein, F.; Duer, M.; Weinstein, L. B.; Amaryan, M. J.; Bullumulla, D.; Hattawy, M.; Zheng, X.; et al.; and The CLAS Collaboration, "¹² C(e,e'pN) Measurements of Short Range Correlations in the Tensor-to-Scalar Interaction Transition Region" (2021). Physics Faculty Publications. 555.
https://digitalcommons.odu.edu/physics_fac_pubs/555