$DD^*$ correlation functions in deciphering the nature of $T_{cc}(3875)^+$
School of Physics, Beihang University（北京航空航天大学物理学院）；Institute for Advanced Study in Nuclear Energy & Safety, College of Physics and Optoelectronic Engineering, Shenzhen University（深圳大学物理与光电工程学院核能与安全高等研究院）；Sino-French Carbon Neutrality Research Center, École Centrale de Pékin/School of General Engineering, Beihang University（北京航空航天大学中法碳中和研究中心/通用工程学院）；Peng Huanwu Collaborative Center for Research and Education, Beihang University（北京航空航天大学彭桓武科教协同中心）；Southern Center for Nuclear-Science Theory (SCNT), Institute of Modern Physics, Chinese Academy of Sciences（中国科学院近代物理研究所南方核科学理论中心）
Understanding near-threshold strong interactions is essential for disentangling hadronic molecules and compact multiquark states in heavy-flavor spectroscopy. In this context, the doubly charmed tetraquark candidate $T_{cc}(3875)^+$ serves as a critical benchmark because it lies very close to the $D^*$-$D$ thresholds. Motivated by the interaction ambiguity reported recently [\href{https://doi.org/10.1103/kd4s-9rzr}{Phys.Rev.D 113, L031505 (2026)}], we evaluate the $D^*$-$D$ scattering lengths and femtoscopic correlation functions for the molecular and molecule-compact admixture assignments of the $T_{cc}(3875)^+$. We show that, although these scenarios yield similar invariant-mass line shapes, their corresponding femtoscopic correlation functions differ markedly and remain clearly distinguishable for typical particle-emitting sources created at the LHC. Our results indicate that femtoscopy can serve as a sensitive and complementary probe of the near-threshold dynamics of $T_{cc}(3875)^+$, providing vital theoretical references for future LHC femtoscopy measurements.
Deciphering the nature of $X(2300)$ with the PACIAE model
School of Physics and Information Technology, Shaanxi Normal University（陕西师范大学物理与信息技术学院）；School of Physics and Electronic Science, Guizhou Normal University（贵州师范大学物理与电子科学学院）；Wuhan Textile University（武汉纺织大学）；Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University（华中师范大学夸克与轻子物理教育部重点实验室及粒子物理研究所）；China Institute of Atomic Energy（中国原子能科学研究院）
Probing the hadronic molecular nature of the $Ω(2012)$, $Ω(2380)$, and $Ω_c(3120)$ via femtoscopy correlation functions
State Key Laboratory of Heavy Ion Science and Technology, Institute of Modern Physics, Chinese Academy of Sciences（中国科学院近代物理研究所）；School of Nuclear Sciences and Technology, University of Chinese Academy of Sciences（中国科学院大学核科学与技术学院）；School of Physics, Zhengzhou University（郑州大学物理学院）；Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna（瓦伦西亚大学-西班牙国家研究委员会理论物理系及IFIC联合研究所）；Southern Center for Nuclear-Science Theory (SCNT), Institute of Modern Physics, Chinese Academy of Sciences（中国科学院近代物理研究所南方核科学理论中心）
Cross-correlation of weak lensing and gamma rays: implications for the nature of dark matter
我们测量了费米-LAT伽马射线光子和来自加拿大-法国-夏威夷望远镜透镜巡天（CFHTLenS）、红星团序列透镜巡天（RCSLenS）和千度巡天（KiDS）的1000度以上的弱透镜数据的$^2$之间的互相关。我们提出了第一次测量层析弱透镜互相关性和第一次应用程序的光谱binning伽马射线和弱透镜之间的互相关性。使用角功率谱估计器进行测量，而使用分析处方估计协方差。我们通过将其与两个内部协方差估计量进行比较来验证我们的协方差估计量的准确性。基于互相关信号的不可检测性，我们导出了弱相互作用大质量粒子（WIMP）暗物质的约束条件。我们计算了暗物质湮灭截面$\langleσ_\rm{ann} v \rangle$、衰变率$Γ_\rm{dec}$和粒子质量$m_\rm{DM}$的排斥极限。我们发现，在没有互相关信号的情况下，层析成像并没有显着提高分析的约束能力。假设一个强大的贡献，由于小规模的集群的暗物质和占已知的天体物理源的伽马射线的伽马射线通量，我们排除了热遗迹截面粒子质量的$m_\rm{DM}\lesssim 20$ GeV。
