تقرير
$^{12}$C(e,e'pN) Measurements of Short Range Correlations in the Tensor-to-Scalar Interaction Transition Region
| العنوان: | $^{12}$C(e,e'pN) Measurements of Short Range Correlations in the Tensor-to-Scalar Interaction Transition Region |
|---|---|
| المؤلفون: | Korover, I., Pybus, J. R., Schmidt, A., Hauenstein, F., Duer, M., Hen, O., Piasetzky, E., Weinstein, L. B., Higinbotham, D. W., Collaboration, the CLAS |
| المصدر: | Phys. Lett. B 820, 136523 (2021) |
| سنة النشر: | 2020 |
| المجموعة: | High Energy Physics - Phenomenology Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Experiment, High Energy Physics - Phenomenology, Nuclear Theory |
| الوصف: | High-momentum configurations of nucleon pairs at short-distance are probed using measurements of the $^{12}$C$(e,e'p)$ and $^{12}$C$(e,e'pN)$ reactions (where $N$ is either $n$ or $p$), at high-$Q^2$ 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 $^{12}$C$(e,e'pN)$ / $^{12}$C$(e,e'p)$ and $^{12}$C$(e,e'pp)$ / $^{12}$C$(e,e'pn)$ 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 $\sim 400$ MeV/c to an isospin-independent scalar interaction at high-momentum around $\sim 800$ MeV/c as predicted by theoretical calculation. Comment: Accepted for publication in Physics Letters B. 7 pages, 3 figures, and online supplementary materials |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.physletb.2021.136523 |
| URL الوصول: | http://arxiv.org/abs/2004.07304 |
| رقم الأكسشن: | edsarx.2004.07304 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.physletb.2021.136523 |
|---|