Thu·Dec 26, 2024Thursday·December 26, 2024

1. 01*

   Excitation of the isoscalar giant monopole resonance using 6Li inelastic scattering

   J. Arroyo · U. Garg🇺🇸 · H. Akimune · G. P. A. Berg🇺🇸 · D. C. Cuong · M. Fujiwara🇯🇵 · M. N. Harakeh🇳🇱 · M. Itoh · T. Kawabata🇯🇵 · K. Kawase · J.T. Matta · D. Patel🇮🇳 · M. Uchida🇯🇵 · M. Yosoi🇯🇵

   The incompressibility of infinite nuclear matter (K_\infty) is a parameter in the description of the nuclear equation of state that governs the energy cost associated with density oscillations near the saturation density. The most direct experimental method for studying this property of infinite nuclear matter is to probe the isoscalar giant monopole resonance (ISGMR) in finite nuclei. This work explores the use of 6Li as a probe to study the ISGMR in several stable nuclei: 58Ni, 90Zr, 116Sn, and 208Pb, as complementary to using inelastic scattering of {\alpha}-particles, which has been used to great effect over the last several decades. Elastic and inelastic scattering data for these targets were collected with 343-MeV 6Li beams. In all nuclei studied in this work, the ISGMR strength distributions extracted from multipole decomposition analyses of the inelastic scattering spectra agree very well with the previously measured ISGMR responses from {\alpha}-particle scattering, establishing the feasibility of employing 6Li inelastic scattering in investigations of the ISGMR.

   nucl-exnucl-thPRC(2025)·4 citations
2. 02*

   QCD sum rule approach to Okamoto-Nolen-Schiffer anomaly

   Hiroyuki Sagawa🇯🇵 · Tomoya Naito🇯🇵 · Xavier Roca-Maza🇪🇸 · Tetsuo Hatsuda🇯🇵

   A new framework is introduced to connect between a charge symmetry breaking (CSB) energy density functional (EDF) and the low-energy constants derived from quantum chromodynamics (QCD). By constructing a QCD-based CSB EDF, this method provides new insights into the Okamoto-Nolen-Schiffer anomaly, a long-standing puzzle in the energy differences of mirror nuclei that lacks a robust microscopic explanation. Using examples such as ${}^{17}\mathrm{F}$-${}^{17}\mathrm{O}$, ${}^{15}\mathrm{O}$-${}^{15}\mathrm{N}$, ${}^{41}\mathrm{Sc}$-${}^{41}\mathrm{Ca}$, and ${}^{39}\mathrm{Ca}$-${}^{39}\mathrm{K}$, we demonstrate that the proposed interaction effectively resolves the anomaly within the range of theoretical uncertainties.

   ↳ nucl-thnucl-exPoS(2025)·0 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.