Evolutions of in-medium baryon-baryon scattering cross sections and stiffness of dense nuclear matter from Bayesian analyses of FOPI proton flow excitation functions
Within a Bayesian statistical framework using a Gaussian Process (GP) emulator for an isospin-dependent Boltzmann-Uehling-Uhlenbeck (IBUU) transport model simulator of heavy-ion reactions with momentum-independent Skyrme interactions, we infer from the proton directed and elliptical flow in mid-central Au+Au reactions at beam energies from 150 to 1200 MeV/nucleon taken by the FOPI Collaboration the posterior Probability Distribution Functions (PDFs) of the in-medium baryon-baryon scattering cross section (BBSCS) modification factor $X$ (with respect to their free-space values) and the stiffness parameter $K$ of dense nuclear matter. We find that the most probable value of $X$ evolves from around 0.7 to 1.0 as the beam energy $E_{beam}/A$ increases. On the other hand, the posterior PDF($K$) may have dual peaks having roughly the same height or extended shoulders at high $K$ values. More quantitatively, the posterior PDF($K$) changes from having a major peak around 220 MeV characterizing a soft EOS in the reaction at $E_{beam}/A$=150 MeV to one that peaks around 320 MeV indicating a stiff EOS in the reactions at $E_{beam}/A$ higher than about 600 MeV. The transition from soft to stiff happens in mid-central Au+Au reactions at beam energies around 250 MeV/nucleon in which $K=220$ MeV and $K=320$ MeV are approximately equally probable. Altogether, the FOPI proton flow excitation function data indicate a gradual hardening of hot and dense nuclear matter as its density and temperature increase in reactions with higher beam energies.
On the flow of kaons produced in relativistic heavy ion collisions
本文研究了FOPI合作组最近在Ni（1.93AGeV）+Ni反应中观察到的K ~+介子对面内流的不同贡献。由于三体相空间衰变的运动学性质，重子-重子相互作用产生的K介子流小于入口通道中的重子流。相反，在π N相互作用中，源的流动和K介子的流动是相同的。因此，除了已知的对kaons与核环境的潜在相互作用的依赖性之外，总kaon流还取决于Delta N -> K+和pi N -> K+反应的相对数量，从而取决于Delta的寿命。
Azimuthal Anisotropy Scaling for Identified Mesons and Baryons: Insights into Medium Transport Properties, Equation of State and Hadronic Re-scattering
Bayesian Constraints on Bosonic Dark Matter in Neutron Stars within a Covariant Density-Functional Equation-of-State Ensemble
University of Wrocław（弗罗茨瓦夫大学）；Institute of Theoretical Physics, University of Wrocław（弗罗茨瓦夫大学理论物理研究所）；Alikhanyan National Science Laboratory (Yerevan Institute of Physics)（阿利哈尼扬国家科学实验室（埃里温物理研究所））；Frankfurt Institute for Advanced Studies（法兰克福高级研究所）
Sensitivity of the excitation functions of collective flow to relativistic scalar and vector meson interactions in the relativistic quantum molecular dynamics model RQMD.RMF
Femtoscopy as a New Probe of the Nuclear Equation of State
Central China Normal University（华中师范大学）；GSI Helmholtzzentrum für Schwerionenforschung GmbH（GSI亥姆霍兹重离子研究中心有限公司）；Helmholtz Research Academy Hesse for FAIR (HFHF)（黑森FAIR亥姆霍兹研究院）；Institut für Theoretische Physik, Johann Wolfgang Goethe-Universität（约翰·沃尔夫冈·歌德大学理论物理研究所）
Cooling of Isolated Neutron Stars with Hyperon-mixed Kaon-Condensation Matter
The University of Manchester（曼彻斯特大学）；Indian Institute of Technology, Roorkee（印度理工学院鲁尔基分校）；RIKEN（理化学研究所）；Chiba Institute of Technology（千叶工业大学）；Kurume Institute of Technology（久留米工业大学）
Evidence for a Continuous Hadron--Quark Transition in Cold Dense Matter
Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Science（中国科学院紫金山天文台暗物质与空间天文重点实验室）；RIKEN Center for Interdisciplinary Theoretical and Mathematical Sciences (iTHEMS), RIKEN（理化学研究所交叉理论数学科学中心（iTHEMS））；Research Center for Nuclear Physics, The University of Osaka（大阪大学核物理研究中心）
