Thu·Jun 9, 2022Thursday·June 9, 2022

1. 01*

   One-neutron halo structure of ${}^{29}$Ne

   J.G. Li · N. Michel🇨🇳 · H.H. Li🇫🇷 · W. Zuo🇨🇳

   We have applied the Gamow shell model to calculate nuclear observables of ${}^{26-31}$Ne isotopes pertaining to one-neutron halo structure, these nuclei being situated close to neutron drip-line. As both many-body correlations and continuum coupling are taken into account in that approach, halo structure can be analyzed properly. Our calculations provide good descriptions of ${}^{26-31}$Ne, where asymptotic behavior is crucial for that matter. One-body density, neutron root-mean-square radii of ${}^{26-31}$Ne, and one-neutron overlap functions of ${}^{29,31}$Ne have been calculated as well. Our results support the presence of a one-neutron \textit{p}-wave halo in ${}^{31}$Ne, already pointed out experimentally. A similar situation also occurs in the ground state of ${}^{29}$Ne, which is mainly a \textit{p}-wave valence neutron coupled to the inner ${}^{28}$Ne \textit{core}. The $3/2^{+}$ excited state of ${}^{29}$Ne, which is dominated by a \textit{d}-wave valence neutron, has also been considered. A larger radius and more extended wave function occur for the ground state of ${}^{29}$Ne when compared to its $3/2^{+}$ first excited state. The present results suggest that ${}^{29}$Ne is a good candidate for one-neutron \textit{p}-wave halo in the medium-mass region.

   ↳ nucl-thnucl-exPLB(2022)·15 citations
2. 02*

   Quark and gluon GPDs at finite skewness from strings in holographic QCD: evolved and compared to experiment

   Kiminad A. Mamo🇺🇸 · Ismail Zahed🇺🇸

   We present a framework for constructing Generalized Parton Distributions (GPDs) using holographic QCD in the large $N_c$ limit, with a focus on low-x and finite skewness. Our approach utilizes holographic amplitudes for exclusive electroproduction processes to extract the spin-j conformal (Gegenbauer) moments of GPDs, which are then evolved to higher resolution scales using QCD evolution equations. Our evolved GPDs (reconstructed from their evolved conformal moments) are applied to analyze the electroproduction of ${\rho }^{0,+}$ and $\varphi$ mesons, and we account for non-perturbative contributions in the $s+u$ - channel using holographic QCD. The results compare well with the existing experimental data. Our GPDs provide detailed information about partonic distributions and are useful for future experimental studies and global data analyses.

   ↳ hep-phhep-exhep-thnucl-ex+1PRD(2023)·13 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.