Fri·Sep 12, 2025Friday·September 12, 2025

1. 01*

   Current problems of studying relativistic dissociation of light nuclei in nuclear emulsion

   D.A. Artemenkov🇷🇺 · N.K. Kornegrutsa · N. Marimuthu · N.G. Peresadko · V.V. Rusakova · A.A. Zaitsev🇷🇺 · P.I. Zarubin🇷🇺 · I.G. Zarubina

   The progress of the study of unstable states in relativistic dissociation events of light nuclei in nuclear emulsion is presented. Identification of these states is possible by means of the invariant mass determined from the most accurate and complete measurements of relativistic fragment emission angles in the approximation of conservation of momentum per nucleon of the parent nucleus. It is established that excitations ${}^{12}\mathrm{C}(0_2^{+})$ and ${}^{12}\mathrm{C}(3^{-})$ lead in the dissociation ${}^{12}\mathrm{C}\to 3\alpha$ and ${}^{16}\mathrm{O}\to 4\alpha$. The contribution of ${}^9\mathrm{B}$ and ${}^{12}\mathrm{C}(0_2^{+})$ decays to the leading channel of ${}^3\mathrm{HeH}$ dissociation of the ${}^{14}\mathrm{N}$ nucleus is estimated. The motivation and the beginning of the analysis of the relativistic dissociation ${}^{16}\mathrm{O}$$\to$${}^{12}\mathrm{C}\alpha$ are presented. The presented relativistic dissociation events at the ${}^7\mathrm{Be}$$\to$${}^6\mathrm{Li}p$ and ${}^{11}\mathrm{C}$$\to$${}^7\mathrm{Be}\alpha$ coupling threshold point to the prospect of moving beyond $\alpha$-particle clustering.

   nucl-exIJMPE(2026)·1 citation
2. 02*

   Scaling approach to rigid and soft nuclear deformation through flow fluctuations in high-energy nuclear collisions

   Lumeng Liu🇨🇳 · Chunjian Zhang🇨🇳 · Jinhui Chen🇨🇳 · Jiangyong Jia🇺🇸 · Xu-Guang Huang🇨🇳 · Yu-Gang Ma🇨🇳

   The nature of octupole deformation, whether static or vibrational, remains an open question in nuclear physics. Here, we propose a scaling approach to probe this ambiguity by triangular flow fluctuations using multi-particle cumulants, $c_{3,\epsilon }\{4\}$, in relativistic ${}^{238}$U+${}^{238}$U collisions. We demonstrate that both $|c_{3,\epsilon }\{4\}|$ and the ratio $|c_{3,\epsilon }\{4\}/c_{3,\epsilon }^2\{2\}|$ scale linearly with the fourth-order moment of octupole deformation, $⟨{\beta }_{3,\mathrm{U}}^4⟩$. Combined with the known linear relation of $c_{3,\epsilon }\{2\}$ to $⟨{\beta }_{3,\mathrm{U}}^2⟩$, this new relation provides a direct extraction of both the mean and variance of the octupole deformation fluctuations, finally discriminating between static and dynamic origins. This work establishes a new tool to probe the static and dynamic collective modes in high-energy nuclear collisions, advancing a significant step toward refining the initial conditions of quark-gluon plasma.

   ↳ nucl-thnucl-exPLB(2026)·8 citations
3. 03*

   Algebraic treatment of alpha-cluster nuclei

   Roelof Bijker🇲🇽 · Omar Alejandro Díaz Caballero

   In this contribution we review the algebraic cluster model (ACM) for $\alpha$-cluster nuclei with $A=4k$ nucleons and its extension to the cluster shell model (CSM) for $A=4k+x$ nuclei. Particular attention is paid to the question to what extent the $\alpha$-cluster structure survives under the addition of extra nucleons. As an example, we discuss the properties of ${}^{12}$C and ${}^{13}$C.

   ↳ nucl-thnucl-exEPJ Web Conf.(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.