Fragmentation of Nuclear Remnants in Electron-Nucleus Collisions at High Energy as a Nonextensive Process

该论文通过非等概率分割法预测了高能电子 - 原子核碰撞中核残留物(如9^9Be^*12^{12}C^*16^{16}O^*)的碎片多重数分布,并结合α\alpha团簇模型与Tsallis统计框架,论证了该核碎裂过程本质上是一个非广延过程。

Ting-Ting Duan, Sahanaa Büriechin, Hai-Ling Lao, Fu-Hu Liu, Khusniddin K. OlimovWed, 11 Ma⚛️ nucl-ex

New Bounds on Heavy QCD Axions from Big Bang Nucleosynthesis

该研究利用大爆炸核合成对氦-4 丰度的精确测量,首次通过计算重 QCD 轴子强子衰变对中子 - 质子比的修正,得出了针对质量高于 300 MeV 轴子寿命的稳健上限(低至 0.017 秒),该限制优于未来宇宙微波背景辐射的预测,且对强子截面、分支比及初始丰度等不确定性不敏感。

Tae Hyun Jung, Takemichi Okui, Kohsaku Tobioka, Jiabao WangWed, 11 Ma⚛️ hep-ph

Mass measurements of 179184^{179-184}Yb identify an anomalous proton-neutron interaction

该研究利用先进的稀有同位素产生与质谱技术,首次精确测量了179184^{179-184}Yb 核素的质量,揭示了208^{208}Pb 以下“空穴 - 空穴”区域存在反常强的质子 - 中子相互作用,并指出当前平均场模型未能准确重现该异常,从而为改进N=126N=126 r-过程等待点附近的核结构描述提供了关键基准。

C. L. Brown, J. Ash, B. Ashrafkhani, J. Bergmann, T. Brunner, J. D. Cardona, R. B. Cakirli, R. F. Casten, C. Chambers, T. Dickel, G. Gwinner, Z. Hockenbery, A. Jacobs, J. Lassen, R. Li, D. Lunney, S. Kakkar, F. Maldonado Millán, N. Minkov, A. Mollaebrahimi, E. M. Lykiardopoulou, S. Paul, W. R. Plaß, W. S. Porter, D. Ray, M. P. Reiter, A. Ridley, C. Scheidenberger, R. Simpson, C. Walls, Y. Wang, A. P. Weaver, A. A. KwiatkowskiWed, 11 Ma⚛️ nucl-ex

Isotopic Measurements of SNM using a Portable Neutron Resonance Transmission System for Arms Control

该研究开发了一套便携式中子飞行时间系统,通过中子共振透射分析(NRTA)在短短两小时内成功对高浓铀、贫铀和反应堆级钚进行了无损测量,并利用 REFIT 工具将 235U 富集度和钚同位素组成的预测误差分别控制在 5% 和 6% 以内,验证了其在军控核查中的可行性。

Mital A. Zalavadia, Ethan A. Klein, Michael E. Moore, Jonathan A. Kulisek, Farheen Naqvi, Glen A. Warren, Areg DanagoulianWed, 11 Ma⚛️ nucl-ex

JLab and J-PARC for the J/{\ensuremath{\psi}} Production at the Threshold

该研究结合 JLab 和 J-PARC 的阈值测量数据,通过多实验组一致性验证了J/ψJ/\psi-质子散射长度的唯象确定结果,并指出即将到来的πp\pi^- p反应测量将有助于解决矢量介子-核子散射长度随质量变化的趋势谜题,从而支持“年轻矢量介子”假说。

Igor I. Strakovsky (GWU), Jung Keun Ahn (Korea U.), William J. Briscoe (GWU), Misha G. Ryskin (PNPI), Axel Schmid (GWU)Wed, 11 Ma⚛️ hep-ph

Extracting the speed of sound of QCD from transverse momentum fluctuations

该研究通过修正 ATLAS 实验数据中低动量粒子探测偏差及强子化噪声,在假设零碰撞参数下夸克 - 胶子等离子体尺寸与多重数无关的前提下,从超中心 Pb+Pb 碰撞的横向动量涨落中提取出温度约为 221 MeV 时的声速为 cs/c=0.496±0.008c_s/c=0.496\pm 0.008,该结果与格点 QCD 第一性原理计算完美吻合。

Mubarak Alqahtani, Tribhuban Parida, Jean-Yves OllitraultWed, 11 Ma⚛️ hep-ph

Characterization of the Low Energy Excess using a NUCLEUS Al2O3Al_2O_3 detector

NUCLEUS 实验利用蓝宝石探测器对低能超出(LEE)现象进行了全面表征,发现其发生率与粒子本底水平无关,但受降温速率影响,且随时间演化的行为可用统一的幂律关系描述,这为未来的本底抑制策略提供了重要指导。

H. Abele (NUCLEUS Collaboration), G. Angloher (NUCLEUS Collaboration), B. Arnold (NUCLEUS Collaboration), M. Atzori Corona (NUCLEUS Collaboration), A. Bento (NUCLEUS Collaboration), E. Bossio (NUCLEUS Collaboration), F. Buchsteiner (NUCLEUS Collaboration), J. Burkhart (NUCLEUS Collaboration), F. Cappella (NUCLEUS Collaboration), M. Cappelli (NUCLEUS Collaboration), N. Casali (NUCLEUS Collaboration), R. Cerulli (NUCLEUS Collaboration), A. Cruciani (NUCLEUS Collaboration), G. Del Castello (NUCLEUS Collaboration), M. del Gallo Roccagiovine (NUCLEUS Collaboration), S. Dorer (NUCLEUS Collaboration), A. Erhart (NUCLEUS Collaboration), M. Friedl (NUCLEUS Collaboration), S. Fichtinger (NUCLEUS Collaboration), V. M. Ghete (NUCLEUS Collaboration), M. Giammei (NUCLEUS Collaboration), C. Goupy (NUCLEUS Collaboration), J. Hakenmüller (NUCLEUS Collaboration), D. Hauff (NUCLEUS Collaboration), F. Jeanneau (NUCLEUS Collaboration), E. Jericha (NUCLEUS Collaboration), M. Kaznacheeva (NUCLEUS Collaboration), H. Kluck (NUCLEUS Collaboration), A. Langenkämper (NUCLEUS Collaboration), T. Lasserre (NUCLEUS Collaboration), D. Lhuillier (NUCLEUS Collaboration), M. Mancuso (NUCLEUS Collaboration), R. Martin (NUCLEUS Collaboration), B. Mauri (NUCLEUS Collaboration), A. Mazzolari (NUCLEUS Collaboration), L. McCallin (NUCLEUS Collaboration), H. Neyrial (NUCLEUS Collaboration), C. Nones (NUCLEUS Collaboration), L. Oberauer (NUCLEUS Collaboration), L. Peters (NUCLEUS Collaboration), F. Petricca (NUCLEUS Collaboration), W. Potzel (NUCLEUS Collaboration), F. Pröbst (NUCLEUS Collaboration), F. Pucci (NUCLEUS Collaboration), F. Reindl (NUCLEUS Collaboration), M. Romagnoni (NUCLEUS Collaboration), J. Rothe (NUCLEUS Collaboration), N. Schermer (NUCLEUS Collaboration), J. Schieck (NUCLEUS Collaboration), S. Schönert (NUCLEUS Collaboration), C. Schwertner (NUCLEUS Collaboration), L. Scola (NUCLEUS Collaboration), G. Soum-Sidikov (NUCLEUS Collaboration), L. Stodolsky (NUCLEUS Collaboration), A. Schröder (NUCLEUS Collaboration), R. Strauss (NUCLEUS Collaboration), R. Thalmeier (NUCLEUS Collaboration), C. Tomei (NUCLEUS Collaboration), L. Valla (NUCLEUS Collaboration), M. Vignati (NUCLEUS Collaboration), M. Vivier (NUCLEUS Collaboration), A. Wallach (NUCLEUS Collaboration), P. Wasser (NUCLEUS Collaboration), A. Wex (NUCLEUS Collaboration), L. Wienke (NUCLEUS Collaboration)Tue, 10 Ma🔬 physics

Physics-Informed Global Extraction of the Universal Small-xx Dipole Amplitude

该研究利用物理信息神经网络,在不预设初始条件参数化形式的前提下,通过结合演化方程约束与多种深度非弹性散射及独占产生实验数据,成功提取出能够统一描述所有观测量的通用小xx偶极子散射振幅,从而解决了传统参数化拟合中总截面与粲夸克通道间的长期矛盾。

Si-Wei Dai, Fu-Peng Li, Long-Gang Pang, Guang-You Qin, Shu-Yi Wei, Han-Zhong Zhang, Wenbin ZhaoTue, 10 Ma⚛️ hep-ph

Production of high-spin ωJ/ρJ\omega_J/\rho_J (J=2,3,4,5J=2,3,4,5) mesons in πp\pi^{-}p reactions

该研究利用有效拉格朗日量方法,通过拟合现有数据成功复现了πp\pi^- p反应中J=3J=3ω3(1670)\omega_3(1670)ρ3(1690)\rho_3(1690)的产生截面,并预测了J=2,4,5J=2,4,5的高自旋ω/ρ\omega/\rho介子具有可观测的截面及前向峰角分布,表明其在未来的πp\pi p介子束实验中极具探测潜力。

Ting-Yan Li, Zi-Yue Bai, Xiang LiuThu, 12 Ma⚛️ nucl-ex