The European Physical Journal A最新文献

{"title":"Deformation evolution and charge radii in even–even W, Os, and Pt isotopes","authors":"HuiWen Deng,&nbsp;Yue Shi","doi":"10.1140/epja/s10050-026-01917-1","DOIUrl":"10.1140/epja/s10050-026-01917-1","url":null,"abstract":"<div><p>The neutron-deficient even–even isotopes of W, Os, and Pt in the region <span>(N=98)</span>–120 provide a valuable framework for investigating shape coexistence and the microscopic drivers of nuclear deformation. Their potential energy curves are calculated using the Skyrme energy density functionals UNEDF1<span>(^textrm{SO})</span> and SLy4, and the corresponding isotopic evolution of mean-square charge radii is systematically analyzed. The results reveal a general prolate-to-oblate shape transition with increasing neutron number, which occurs around <span>(Napprox 116)</span> in the W and Os isotopes and around <span>(Napprox 110)</span> in the Pt chain. This transition is accompanied by the emergence of triaxiality at <span>(N approx 114)</span>, 112, and 110 for W, Os, and Pt isotopes, respectively. Additionally, the potential energy surfaces become systematically softer along the <span>(gamma )</span> coordinate with increasing proton number <i>Z</i>. We analyze the evolution of the charge radii of the three isotopic chains. The charge radii increase smoothly with increasing neutron number. A pronounced local jump in radii is observed in the Pt isotopes at <span>(N=110)</span>. This can be attributed to the complicated deformation changes in the <span>(beta _2)</span>-<span>(gamma )</span> plane. In general, the deformation moves toward a smaller <span>(beta _2)</span> with increasing neutron number. In addition, self-consistent blocking calculations for the odd-mass <span>(^{183,185,193,195,197}textrm{Pt})</span> isotopes demonstrate a strong configuration dependence of nuclear deformation and charge radii, providing microscopic insight into the shape evolution in this mass region.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of 3D macro physics and nuclear physics on the s-process during He-flashes in Asymptotic Giant Branch stars","authors":"Umberto Battino,&nbsp;Joshua Issa,&nbsp;Falk Herwig,&nbsp;Andreas Best","doi":"10.1140/epja/s10050-026-01903-7","DOIUrl":"10.1140/epja/s10050-026-01903-7","url":null,"abstract":"<div><p>The <span>(mathrm { He})</span>-intershell in Asymptotic Giant Branch stars is a main site for the <i>s</i>-process, but 1D stellar models rely on the mixing length theory, which does not match the radial velocity profiles of 3D hydrodynamic simulations of <span>(mathrm { He})</span>-flashes. We investigate how 3D macro physics-informed mixing impacts the nucleosynthesis of <i>s</i>-nuclei. We post-process the pulse-driven convective zone of the <span>(M_textrm{ZAMS}=3;mathrm {textrm{M}_odot })</span>, <span>(Z=0.01)</span> model from the NuGrid stellar data set. Applying a downturn to velocities at the boundary and increasing velocities across the shell as obtained in previous results, we find that, within a single <span>(mathrm { He})</span>-flash, adopting 3D-inspired mixing profiles leads to only minor variations in the production of <span>(s)</span>-process isotopes, typically at the level of fractions of a <span>(delta )</span> point in zirconium and barium isotopic ratios. In contrast, nuclear physics uncertainties, particularly those associated with the <span>(mathrm {^{22}Ne}(alpha ,n)mathrm {^{25}Mg})</span> neutron source, produce significantly larger effects. Our results nevertheless suggest that the decreased mixing efficiency at the bottom of the pulse-driven convection zone predicted by hydrodynamic simulations may lead to structural changes if implemented self-consistently in full stellar evolution models from the onset of the AGB phase, potentially affecting the efficiency of convection-induced mixing beneath the 1D Schwarzschild boundary of the <span>(mathrm { He})</span> intershell thermal pulses boundary. However, establishing robust parametrisations of such effects will require 3D hydrodynamic simulations of the <span>(mathrm { He})</span>-flash that include sufficiently deep stable layers below the convective region.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-026-01903-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148465947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identification of MNT fragments produced by an energy-degraded (^{238}textrm{U}) beam on a (^{209}textrm{Bi}) target at the FRS Ion Catcher","authors":"A. Shraier,&nbsp;P. Constantin,&nbsp;T. Dickel,&nbsp;I. Mardor,&nbsp;A. Mollaebrahimi,&nbsp;D. Amanbayev,&nbsp;S. Ayet San Andrés,&nbsp;J. Bergmann,&nbsp;Z. Ge,&nbsp;E. Haettner,&nbsp;D. Kar,&nbsp;G. Kripko-Koncz,&nbsp;D. Kumar,&nbsp;K. Mahajan,&nbsp;D. J. Morrissey,&nbsp;M. Narang,&nbsp;W. R. Plaß,&nbsp;C. Scheidenberger,&nbsp;M. Simonov,&nbsp;N. Tortorelli,&nbsp;J. Yu,&nbsp;J. Ahokas,&nbsp;B. Amorim,&nbsp;S. Bagchi,&nbsp;M. Bajzek,&nbsp;D. L. Balabanski,&nbsp;K. Botsiou,&nbsp;V. Charviakova,&nbsp;T. Eronen,&nbsp;S. Glöckner,&nbsp;C. Hornung,&nbsp;N. Hubbard,&nbsp;A. Jaries,&nbsp;N. Kalantar-Nayestanaki,&nbsp;A. Kankainen,&nbsp;A. Karmakar,&nbsp;R. Lozeva,&nbsp;J. L. Rodríguez-Sánchez,&nbsp;I. Mitsiou,&nbsp;M. P. Reiter,&nbsp;E. Piasetzky,&nbsp;V. Piau,&nbsp;Zs. Podolyák,&nbsp;R. Prajapat,&nbsp;D. Prajapati,&nbsp;S. Purushothaman,&nbsp;M. Reponen,&nbsp;E. Rocco,&nbsp;J. Ruotsalainen,&nbsp;D. Kostyleva,&nbsp;S. K. Singh,&nbsp;A. Spătaru,&nbsp;A. State,&nbsp;I. Stefănescu,&nbsp;Y. K. Tanaka,&nbsp;L. Trache,&nbsp;L. Welde,&nbsp;J. Zhao,&nbsp;for the Super-FRS Experiment Collaboration","doi":"10.1140/epja/s10050-026-01914-4","DOIUrl":"10.1140/epja/s10050-026-01914-4","url":null,"abstract":"<div><p>An experiment on multi-nucleon transfer (MNT) reactions was performed at the FRS Ion Catcher at GSI-FAIR, where an energy-degraded ²³⁸U beam reacted with a ²⁰⁹Bi target inside the Cryogenic Stopping Cell (CSC). Target-like fragments (TLF) produced in the CSC were extracted and identified using a Multiple-Reflection Time-of-Flight Mass Spectrometer (MR-TOF-MS). The yields of eight mass-identified A = 210 and A = 211 nuclei were analyzed as a function of degrader thickness, which determines the incoming ²³⁸U beam energy, by comparing their dependence on degrader thickness with that of elastic-scattering products. The results indicated that they are produced in MNT reactions. This experiment is the first in which a broad range of MNT fragments was observed in an ion catcher following beam energy degradation from the relativistic realm to the MNT range, just above the Coulomb barrier. It sets the stage for further MNT experiments that are planned at the FRS Ion Catcher with different targets and unstable secondary ion beams.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13364831/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148451090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Abnormal dense and dilute nuclear systems","authors":"E. E. Kolomeitsev,&nbsp;D. N. Voskresensky","doi":"10.1140/epja/s10050-026-01848-x","DOIUrl":"10.1140/epja/s10050-026-01848-x","url":null,"abstract":"<div><p>Researchers have long been interested in exotic states of matter. In the early 1970s, Migdal proposed existence of metastable or stable nuclei containing a pion condensate, and Bodmer posited existence of collapsed nuclei with a quark core. Lee and Wick proposed that compressed nuclear matter could undergo a phase transition into a scalar condensate state with effectively very light baryons. In the mid-1980s, Witten pointed out that strange quark matter may be an absolutely stable form of matter that can exist in the form of quark strangelets. These hypotheses stimulated large experimental efforts to detect these states in heavy-ion collisions and in terrestrial samples. Additionally, the cosmos is the arena for a broad search for traces of exotic matter in compact objects and other energetic phenomena. We review various approaches and arguments for a possibility of abnormal states of matter, including metastable and stable dense objects with condensates, as well as dilute nuclear objects. Among these, we discuss scalar condensate, p-wave and s-wave pion condensations in dense nuclear systems and formation of a <span>(Delta )</span> resonance matter. Then we consider a scalar mode condensation triggered by the Pomeranchuk instability in dilute nuclear matter, and a clustering. We also mention recent ideas that a relativistic rotation and a dark-matter component may stabilize abnormal nuclear systems. Finally, we list some observational anomalies which cannot be yet appropriately explained by conventional physics.\u0000</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-026-01848-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nuclear structure and properties in superstrong magnetic fields","authors":"Wei Jiang,&nbsp;Yu Guo,&nbsp;Yan-jun Chen","doi":"10.1140/epja/s10050-026-01895-4","DOIUrl":"10.1140/epja/s10050-026-01895-4","url":null,"abstract":"<div><p>We investigate nuclear properties under ultra-strong magnetic fields (<span>(B = 10^{17})</span>–<span>(10^{18})</span> G) using a modified three-dimensional <span>Sky3D</span> code that includes time-odd terms in the Skyrme energy density functional. The calculations are performed with the SLy4d Skyrme force for the magic nuclei <span>(^{80}textrm{Zn})</span> and <span>(^{132}textrm{Sn})</span>, as well as the non-magic nucleus <span>(^{56}textrm{Fe})</span>. We analyze the total binding energies and energy decompositions, nuclear sizes and shapes (for which comparisons with and without the time-odd terms are made), as well as the single-particle levels, angular momenta, and spin polarizations. We find that the magnetic field affects the total binding energy and its components – including the magnetic coupling terms, as well as the time-even and time-odd contributions – in distinct ways. For <span>(B &gt; 10^{17},textrm{G})</span>, the nuclear mass, shape, and size exhibit significant variations, with the corresponding curves showing jagged variations. We derive field-dependent expressions for <span>(L_z)</span> and <span>(S_z)</span>, and find that around <span>(B approx 6 times 10^{17},textrm{G})</span> the nucleon states evolve from mixed to nearly pure configurations, accompanied by a transition from the anomalous Zeeman regime to the Paschen–Back regime. Moreover, nuclear polarization is strongly field dependent, forming ring-like structures consistent with circulating currents, with the rings shrinking as the field increases.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148466013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microscopic analysis of yrast and near yrast band structures in even–even (^{188-196})Hg isotopes","authors":"Umera Nawaz,&nbsp;Manvi Rajput,&nbsp;Suram Singh,&nbsp;Amit Kumar,&nbsp;G. H. Bhat,&nbsp;Arun Bharti,&nbsp;J. A. Sheikh","doi":"10.1140/epja/s10050-026-01904-6","DOIUrl":"10.1140/epja/s10050-026-01904-6","url":null,"abstract":"<div><p>In this work, a detailed theoretical investigation of the even–even <span>(^{188-196})</span>Hg isotopes has been carried out employing the Triaxial Projected Shell Model (TPSM). The study focuses on the interplay between shape coexistence, triaxial deformation and the nature of <span>(gamma )</span>-bands in these isotopes. Two sets of deformation parameters i.e., oblate and prolate, have been used to examine the shape coexistence in these nuclei. The analysis of energy spectra reveals that the yrast bands exhibit oblate character while the <span>(gamma )</span>-bands are better described with prolate deformation.The evolution of low lying excited 0<span>(^+)</span> bands has also been examined across the isotopic chain. <span>(R_{4/2})</span> ratios and energy staggering in <span>(gamma )</span>-bands suggest that these isotopes exhibit <span>(gamma )</span> softness. Moreover, the calculated rotational alignment, B(E2) and g-factors exhibit good consistency with the available experimental observations. Overall, this comprehensive study provides a deeper understanding of the structural properties and shape transition of the Hg isotopes in the vicinity of <i>Z</i> = 82 shell closure.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148465949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New measurement system for the spin correlation coefficients in deuteron–proton elastic scattering","authors":"Y. Saito,&nbsp;K. Sekiguchi,&nbsp;A. Watanabe,&nbsp;K. Suzuki,&nbsp;H. Sugahara,&nbsp;D. Takahashi,&nbsp;K. Tateishi,&nbsp;S. Otsuka,&nbsp;H. Sakai,&nbsp;N. Sakamoto,&nbsp;T. Wakasa,&nbsp;H. Nishibata,&nbsp;K. Aradono,&nbsp;Y. Nagao,&nbsp;K. Hirasawa,&nbsp;Y. Maeda,&nbsp;H. Umetsu,&nbsp;J. Solà Cava,&nbsp;S. Heihoff,&nbsp;A. A. Filin,&nbsp;E. Epelbaum,&nbsp;J. Golak,&nbsp;R. Skibiński,&nbsp;H. Witała","doi":"10.1140/epja/s10050-026-01902-8","DOIUrl":"10.1140/epja/s10050-026-01902-8","url":null,"abstract":"<div><p>Recent years have seen a growing need for high-precision data on spin observables in nucleon–deuteron (<i>Nd</i>) elastic scattering below the pion production threshold. Such data are expected to play a crucial role in advancing the understanding of the three-nucleon force (3<i>N</i>F) and in establishing its description within the framework of chiral effective field theory (<span>(chi )</span>EFT). This paper presents a new measurement system developed at the RIKEN RI Beam Factory to address such demand, featuring a solid-state polarized proton target and the KuJyaku detector for deuteron–proton (<i>d</i>–<i>p</i>) elastic scattering experiments. In conjunction with the polarized deuteron beams provided by the polarized ion source at RIKEN, the system enables measurement of the spin correlation coefficients—for which data remain scarce—along with the deuteron and proton analyzing powers in <i>d</i>–<i>p</i> elastic scattering. Performances of the newly developed target and detector systems were evaluated under realistic beam conditions through deuteron–polarized proton scattering experiment at 135 MeV/nucleon. The angular distribution of the extracted relative differential cross-section and proton analyzing power exhibit close agreement with existing data, validating the identification of <i>d</i>–<i>p</i> elastic events using the KuJyaku detector. The absolute polarization of the solid-state polarized proton target was determined to be <span>(0.034 pm 0.004_mathrm{stat.} pm 0.001_mathrm{sys.})</span>, with its stability under beam irradiations confirmed throughout the experiment. Discussions are presented on the estimated uncertainties of the spin correlation coefficients to be measured. The results are compared with the latest sensitivity studies on the low-energy constants in the 3<i>N</i>F sector of <span>(chi )</span>EFT at the fifth order (N<span>(^4)</span>LO), demonstrating the feasibility of spin-observable measurements using the new experimental apparatus as a crucial step toward establishing the high-precision 3<i>N</i>F potential.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13342034/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148414155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The finite amplitude method for nuclear collective motion","authors":"Takashi Nakatsukasa,&nbsp;Nobuo Hinohara","doi":"10.1140/epja/s10050-026-01862-z","DOIUrl":"10.1140/epja/s10050-026-01862-z","url":null,"abstract":"<div><p>The linear response theory is a powerful tool to study properties of quantum many-particle systems. It uses a one-body perturbation field (as a pump) and measures a change in another (or the same) one-body observable (as a probe). In the context of time-dependent density functional theory (TDDFT), the primary target of the linear response is the density response. The finite amplitude method (FAM) significantly reduces both computational cost and coding tasks, and succeeds in facilitating the linear response calculations in a variety of fields in nuclear physics. We start with a review of the linear response theory and present the essence of the FAM theory and various applications, especially in studies of nuclear collective dynamics.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-026-01862-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New NanoSIMS multielement isotope data reveal CO novae as key sources of 13C-rich presolar silicon carbide grains","authors":"Jordi José,&nbsp;Nan Liu,&nbsp;Conel M. O’D. Alexander,&nbsp;Jianhua Wang","doi":"10.1140/epja/s10050-026-01882-9","DOIUrl":"10.1140/epja/s10050-026-01882-9","url":null,"abstract":"<div><p>We present new multielement NanoSIMS isotopic measurements (C, N, Si, Mg–Al, Ti, and Ni) for four putative nova SiC grains and 79 AB SiC grains from the Murchison meteorite to reassess their stellar origins. High-resolution imaging and a revised Mg/Al relative sensitivity factor for SiC yield substantially improved ²⁶Al/²⁷Al ratios and the most reliable multielement characterization to date for ¹³C-rich presolar SiC grains. To interpret these data, we computed an expanded suite of hydrodynamic CO, ONe, and recurrent nova models spanning a range of white-dwarf masses and pre-enrichment parameters. When all isotopic systems are considered together—C, N, Mg–Al, Si, Ti, and Ni—the CO nova models provide the closest and most self-consistent match to both the putative nova grains and the subset of AB grains lacking <i>s</i>-process signatures. CO novae of low- to intermediate-mass naturally reproduce the observed ¹⁴N/¹⁵N–²⁶Al/²⁷Al trend, the Si isotope compositions of AB grains which dominantly reflect Galactic chemical evolution (GCE), and the mild Si isotope shifts in putative nova grains relative to the GCE trend defined by AB grains. In contrast, ONe and recurrent nova models fail multiple isotopic constraints simultaneously. These results demonstrate that low- to intermediate-mass CO novae (0.6–1.0 <span>({text{M}}_{ odot })</span>) are the most plausible stellar sources of ¹³C-rich SiC dust lacking <i>s</i>-process signatures (1–2% of all presolar SiC), and they establish a multielement, model-anchored framework for quantifying nova contributions to the dust reservoir in the interstellar medium.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-026-01882-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coupled charm and charmonium transport in a strongly coupled quark–gluon plasma","authors":"Kaiyu Fu,&nbsp;Biaogang Wu,&nbsp;Ralf Rapp","doi":"10.1140/epja/s10050-026-01897-2","DOIUrl":"10.1140/epja/s10050-026-01897-2","url":null,"abstract":"<div><p>The quark–gluon plasma (QGP) is a strongly coupled medium in which both open and hidden charm particles experience substantial nonperturbative interactions. This poses a major challenge for a quantitative description of charmonium transport in ultra-relativistic heavy-ion collisions, as it requires a mutually consistent treatment of pertinent transport coefficients. In this work, we present a coupled charm-charmonium transport framework for a strongly coupled QGP based on thermodynamic <i>T</i>-matrix interactions with recent constraints from Wilson-line correlators (WLCs) computed in lattice QCD. For the first time, the same underlying heavy-light interactions and in-medium spectral functions are used to self-consistently evaluate charm-quark diffusion and charmonium kinetics. In particular, the charmonium equilibrium limit, a critical transport parameter for regeneration, is evaluated in the presence of broad spectral functions. Charm-quark diffusion is simulated via Langevin dynamics and coupled to a Boltzmann equation for charmonium dissociation and regeneration. The equilibrium limit of the statistical model is recovered once charm quarks thermalize, and its extension to describe off-equilibrium is constructed. Preliminary applications to charmonium observables in Pb–Pb collisions at the LHC capture the measured centrality and momentum dependence fairly well.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"62 7","pages":""},"PeriodicalIF":3.0,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-026-01897-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148380689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}