Thu·Sep 11, 2025Thursday·September 11, 2025

1. 01*

   Field-theoretic versus data-driven evaluations of electromagnetic corrections to hadronic vacuum polarization in $(g-2{)}_{\mu }$

   Volodymyr Biloshytskyi🇩🇪 · Dominik Erb🇩🇪 · Harvey B. Meyer🇩🇪 · Julian Parrino🇩🇪 · Vladimir Pascalutsa🇩🇪

   The Standard Model prediction of the muon $g-2$ increasingly depends on lattice QCD computations of the hadronic vacuum polarization (HVP), where the isospin-breaking (IB) effects remain a significant source of uncertainty. To complement the lattice QCD evaluations, the data-driven approach to HVP has been used to assess some of the electromagnetic IB effects, in particular from the channels with a photon in the final state, e.g., $e^{+}{e}^{-}\to {\pi }^0\gamma$. Here we argue that such contributions are largely canceled by virtual electromagnetic corrections to the purely hadronic channels: ${\pi }^{+}{\pi }^{-}$, ${\pi }^{+}{\pi }^{-}{\pi }^0$, etc. We identify these leading corrections by performing a field-theoretical calculation in a vector-meson dominance model, thereby reconciling the timelike and spacelike approaches to electromagnetic effects. Although these virtual corrections are more difficult to extract in a systematic manner, addressing them is essential for the data-driven method to consistently complement the lattice QCD program.

   hep-phhep-latEPJC(2026)·4 citations
2. 02*

   Flavor physics at high-energy muon colliders

   Alfredo Glioti🇮🇹 · David Marzocca🇮🇹 · Andrea Wulzer🇪🇸

   Flavor-breaking interactions due to heavy new physics can be probed at a 10 TeV muon collider in the high-energy production of quarks and leptons. The high collision energy mitigates the suppression of the new interactions, offering sensitivity to interaction scales well above 100 TeV both in the lepton and in the quark sector. We investigate all possible deformations of the Standard Model that produce quadratic growth with energy of the four-fermion scattering amplitudes at the muon collider, and we derive sensitivity projections. Electroweak radiation emission gives access to new observable final states like for instance the production of a charged pair of fermions by the emission of at least one W boson. This, combined with jet flavor tagging, improves the sensitivity and the ability to disentangle different interactions. Currently, the best probes of flavor-breaking new physics are high-intensity low-energy measurements of lepton or hadron decays or oscillations. The high-energy probes at the muon collider, of the interactions containing a muon bilinear, are competitive with current bounds and strongly superior for some class of transitions. The sensitivity extends to operators involving the top quark that cannot be tested at low energy. In addition, muon collider probes are generically less exposed to experimental or theoretical mismodeling uncertainties as they do not target the observation of extremely rare phenomena, nor they rely on extremely accurate measurements and theoretical predictions: the energy enhancement makes the putative effects relatively easy to observe. Muon collider measurements offer a novel pathway towards the exploration of flavor physics at the energy rather than at the intensity frontier.

   hep-phhep-exJHEP(2025)·7 citations
3. 03*

   Affleck-Dine Leptoflavorgenesis

   Kensuke Akita🇯🇵 · Koichi Hamaguchi🇯🇵 · Maksym Ovchynnikov🇨🇭

   We propose a scenario to produce large primordial lepton flavor asymmetries with vanishing total lepton asymmetry, based on the Affleck-Dine mechanism with Q-ball formation. This scenario can produce large lepton flavor asymmetries while automatically maintaining the vanishing total lepton number without fine-tuning, evading the current BBN and the CMB constraints by neutrino oscillations at MeV temperature. The asymmetries can be produced at cosmic temperatures of $T\gtrsim 1\mathrm{GeV}$, early enough to have broad impacts from the early Universe to the present cosmology. This scenario could affect various aspects of early Universe cosmology simultaneously or separately: (i) explaining the observed baryon asymmetry by the same origin as the lepton flavor asymmetries, (ii) affecting the nature of the QCD transition, (iii) opening up a new parameter space of sterile neutrino dark matter by enhancing their production, and (iv) altering the abundance of the light elements, in particular, resolving the recently reported helium-4 anomaly.

   hep-phastro-ph.COJHEP(2025)·9 citations
4. 04*

   Neutrino mass and mixing, resonant leptogenesis and charged lepton flavor violation in a minimal inverse seesaw model with $S_4$ symmetry

   V. V. Vien🇻🇳 · Mayengbam Kishan Singh🇮🇳

   We propose a minimal inverse seesaw model with $S_4$ symmetry for the Majorana neutrinos with only one real ($m_0$)-and two complex ($\alpha ,\beta$) parameters in neutrino sector which gives reasonable predictions for the neutrino oscillation parameters, the observed baryon asymmetry of the Universe and the charged lepton flavor violation. The resulting model reveals a favor for normal neutrino mass ordering, a higher octant of ${\theta }_{23}$ and a lower half-plane of Dirac CP violation phase. The predictions of the model for sum of neutrino masses and the effective Majorana neutrino mass are centered around 58.98 meV and 6.2 meV, respectively. The model also provides the predictions of the baryon asymmetry and charged lepton flavour violation processes which are consistent with the experimental observations.

   hep-phEPJC(2026)·0 citations
5. 05*

   Oblique corrections in general dark $U(1)$ models

   Cheng-Wei Chiang🇹🇼 · Kazuki Enomoto🇹🇼

   We investigate the impact of dark Abelian gauge bosons on the electroweak precision measurements at the one-loop level. The dark gauge boson couples to the standard model fermions generally via two kinds of mixing with the electroweak gauge bosons: the kinetic mixing and the mass mixing. We solve the Schwinger-Dyson equation for the gauge boson propagators and derive a renormalization scheme-independent representation of the scattering amplitudes for four-fermion processes, including the full oblique corrections. We define the running parameters at the one-loop level and show that the leading new physics effects, including the mixing, in the electroweak precision observables can be described by the oblique parameters $S$, $T$, and $U$ as in the standard electroweak gauge theory when the new physics scale is sufficiently high and the dark gauge boson mass lies away from the $Z$ pole. We consider the dark doublet scalar boson as an example and numerically show that a novel one-loop effect can drastically change the parameter region allowed by the electroweak precision tests.

   hep-phJHEP(2026)·0 citations
6. 06*

   $T\times \mu$ phase diagram from a fractal NJL model

   E. Megias🇪🇸 · A. Deppman🇧🇷 · V. S. Timóteo🇧🇷

   We propose a $\mu$-dependent coupling for a fractal effective model (FNJL) to make the results for the phase diagram compatible with the experimental data and lattice QCD calculations. The $\mu$-dependence of the coupling, which accounts for gluon effects, is obtained by fitting the lattice QCD results for the pseudo-critical temperature with the fractal model. We then use the new effective coupling in order to compute the dynamical mass, the quark condensate, the thermal susceptibility and, finally, the $T\times \mu$ phase diagram. We consider both extensive and non-extensive statistics, and with a slight variation in the $\mu$-dependent coupling parameters we provide a single result for our model which is able to describe incredibly well the data from STAR, considering the simplicity of the effective model.

   hep-phhep-latnucl-th0 citations
7. 07*

   Probing one-loop--induced decay channel $H^{\pm }\to W^{\pm }\gamma$ in the Two Higgs Doublet Models at muon-TeV colliders

   Dzung Tri Tran (Duy Tan Uni.)🇻🇳 · Quang Hoang-Minh Pham🇻🇳 · Khoa Ngo-Thanh Ho🇻🇳 · Khiem Hong Phan (Duy Tan Univ.)🇻🇳

   In this work, we study the one-loop--induced decay channel $H^{\pm }\to W^{\pm }\gamma$ in the general ${\mathcal{R}}_{\xi }$ gauge within Two Higgs Doublet Models. We analytically verify the gauge invariance ($\xi$-independence), ultraviolet finiteness, and renormalization-scale independence of the one-loop form factors, thereby confirming the consistency of our calculations. On the phenomenological side, we perform a parameter scan of the Type-I THDM and, based on the viable parameter space, evaluate the branching ratios of this decay process. Furthermore, we investigate charged Higgs pair production at muon-TeV colliders through the representative processes ${\mu }^{+}{\mu }^{-}\to H^{+}{H}^{-}\to W^{+}{W}^{-}h\gamma$ and ${\mu }^{+}{\mu }^{-}\to \gamma \gamma \to H^{+}{H}^{-}\to W^{+}{W}^{-}h\gamma$, as typical applications of our results. The events for the processes are computed within the allowed parameter regions of the Type-I THDM. The corresponding signal significances are evaluated, including the relevant Standard Model backgrounds, at a center-of-mass energy of $\sqrt{s}=3$~TeV. With the high integrated luminosity expected at muon-TeV colliders, reaching up to $\mathcal{L}=3000{\text{fb}}^{-1}$, our analysis indicates that the signals can be detected with a statistical significance of $5\sigma$ for several benchmark scenarios in the viable parameter space of the Type-I THDM.

   hep-phPhys.Scripta(2026)·4 citations
8. 08*

   Flavor constraints from $pp\to Vh$ and $pp\to VW$ at the LHC

   O. J. P. Éboli🇧🇷 · L. P. S. Leal🇧🇷 · M. Martines🇧🇷 · O. Sumensari🇫🇷

   We investigate the potential of associated Higgs $pp\to Vh$ and diboson production $pp\to VW$ channels at the LHC (with $V=W,Z$) to constrain flavor-physics operators. Within a general Effective Field Theory (EFT) framework, we derive the helicity amplitudes for these processes at high energies and identify the leading contributions from dimension-six operators involving different quark flavors. Using available LHC data, we show that these processes are sensitive to non-trivial flavor structures and provide complementary constraints to those from low-energy observables. We illustrate this synergy through an explicit comparison between our LHC bounds with electroweak precision data, and with flavor limits derived from charged-current pion and kaon decays. In particular, we show that our HL-LHC projections can probe viable EFT scenarios proposed to accommodate the discrepancies in the extraction of the Cabibbo angle.

   hep-phJHEP(2026)·3 citations
9. 09*

   Agents of Discovery

   Sascha Diefenbacher🇺🇸 · Anna Hallin🇩🇪 · Gregor Kasieczka🇩🇪 · Michael Krämer🇩🇪 · Anne Lauscher🇩🇪 · Tim Lukas🇩🇪

   The substantial data volumes encountered in modern particle physics and other domains of fundamental physics research allow (and require) the use of increasingly complex data analysis tools and workflows. While the use of machine learning (ML) tools for data analysis has recently proliferated, these tools are typically special-purpose algorithms that rely, for example, on encoded physics knowledge to reach optimal performance. In this work, we investigate a new and orthogonal direction: Using recent progress in large language models (LLMs) to create a team of agents -- instances of LLMs with specific subtasks -- that jointly solve data analysis-based research problems in a way similar to how a human researcher might: by creating code to operate standard tools and libraries (including ML systems) and by building on results of previous iterations. If successful, such agent-based systems could be deployed to automate routine analysis components to counteract the increasing complexity of modern tool chains. To investigate the capabilities of current-generation commercial LLMs, we consider the task of anomaly detection via the publicly available and highly-studied LHC Olympics dataset. Several current models by OpenAI (GPT-4o, o4-mini, GPT-4.1, and GPT-5) are investigated and their stability tested. Overall, we observe the capacity of the agent-based system to solve this data analysis problem. The best agent-created solutions mirror the performance of human state-of-the-art results.

   hep-phcs.AIcs.LGhep-ex+121 citations
10. 10*

    Integrated subtraction terms and finite remainders for arbitrary processes with massless partons at colliders in the nested soft-collinear subtraction scheme

    Federica Devoto🇺🇸 · Kirill Melnikov🇩🇪 · Raoul Röntsch🇮🇹 · Chiara Signorile-Signorile🇩🇪 · Davide Maria Tagliabue🇩🇪 · Matteo Tresoldi🇩🇪

    We present integrated subtraction terms and finite remainders for arbitrary processes with massless partons at hadron and lepton colliders in the context of the nested soft-collinear subtraction scheme. These results provide the very last ingredients needed to make this scheme a fully local, analytic and process-independent framework for treating infrared singularities at next-to-next-to-leading order in perturbative QCD. The explicit infrared finiteness of all required contributions, as well as their process-independence, puts these results on par with subtraction schemes developed for next-to-leading order computations and opens up a clear path towards the automation of next-to-next-to-leading order computations in QCD.

    hep-phJHEP(2026)·9 citations
11. 11*

    Light Meson Resonances

    J. R. Pelaez (U. Complutense de Madrid and IPARCOS)🇪🇸

    We provide a modern pedagogical introduction to light mesons. We discuss their masses and widths, their classification into multiplets of isospin and flavor SU(3), as well as other quantum numbers, mixing schemes, observable states, and their disposition in Regge trajectories. We briefly introduce the relevant concepts of Quantum Chromodynamics, including confinement, chiral symmetry, and the relationship between poles and resonances. We discuss their interpretation in terms of quark-model ordinary quark-antiquark states or non-ordinary states like exotics, multiquarks, or glueballs. Finally, we comment on the open issues that are still under discussion.

    hep-phnucl-th9 citations
12. 12*

    Probing the Axion-Photon-Dark Photon Interaction at Future $e^{+}{e}^{-}$ Colliders

    Chuan-Ren Chen🇹🇼 · Yuan-Feng Hsieh🇹🇼 · Van Que Tran🇹🇼

    We study the interaction between photons, dark photons, and axions at future lepton colliders, focusing on single-photon events with missing energy as the experimental signature. We find that future facilities such as the ILC, CEPC, and FCC-ee will be sensitive to the axion--photon--dark photon coupling down to the order of $10^{-4}{\mathrm{GeV}}^{-1}$ for dark photon masses around $O(10\mathrm{GeV})$, assuming that the axion is extremely light and escapes detection. We further show that longitudinal beam polarization at the ILC can enhance the signal significance by a factor of four, providing the strongest projected reach in the model parameter space. Existing constraints from LEP II are analyzed for comparison. Furthermore, the mass of dark photon can be determined by measuring the sharp drop-off in the distribution of the recoil mass.

    hep-phPRD(2026)·1 citation
13. 13*

    Constraining the Resolution Length of Quark-Gluon Plasma with New Jet Substructure Measurements

    Arjun Srinivasan Kudinoor🇺🇸 · Daniel Pablos🇪🇸 · Krishna Rajagopal🇺🇸

    We show that recent measurements of substructure-dependent jet suppression constrain the value of the resolution length of the droplets of quark-gluon plasma (QGP) formed in heavy ion collisions. This resolution length, $L_{\mathrm{res}}$, is defined such that the medium can only resolve partons within a jet shower that are separated by more than $L_{\mathrm{res}}$. We first use Hybrid Model calculations to reproduce ALICE measurements of the scaled Soft Drop angle ${\theta }_g$ for anti-$k_t$ $R=0.2$ jets reconstructed from charged-particle tracks. We find that the narrowing of the ${\theta }_g$-distribution in PbPb collisions compared to pp collisions that is seen in the ALICE data rules out a picture of fully coherent energy loss ($L_{\mathrm{res}}=\infty$) where each entire parton shower loses energy to the plasma as if it were a single unresolved colored object. We then use Hybrid Model calculations to reproduce ATLAS measurements of $d{R}_{12}$, the Soft Drop angle obtained by applying the Soft Drop grooming procedure to all charged-particle tracks in $R=1$ jets reconstructed from $R=0.2$ skinny subjets. Our analysis demonstrates that the ATLAS measurements of $R_{\mathrm{AA}}$ for such $R=1$ jets as a function of $d{R}_{12}$ are inconsistent with a picture of fully incoherent energy loss ($L_{\mathrm{res}}=0$) in which every splitting in a parton shower is immediately resolved by the plasma. We find that our Hybrid Model calculations agree best with the ATLAS measurements if QGP has a finite, nonzero, resolution length $L_{\mathrm{res}}\sim (1-2)/(\pi T)$. For the first time, jet substructure measurements are constraining the resolution length of QGP from below, as well as from above.

    hep-phnucl-exnucl-th6 citations
14. 14*

    nuSTORM as a Precision Probe of the Standard Model and New Physics

    Jack Franklin🇬🇧 · Rohan Kamath🇬🇧 · Dhruv Pasari🇬🇧 · Yuber F. Perez-Gonzalez🇪🇸 · Jessica Turner🇬🇧 · Maria Athina Vogiatzi🇬🇧

    The Neutrinos from Stored Muons (nuSTORM) facility will generate neutrino beams from both muon and meson decays in a storage ring, providing a neutrino flux known to the percent level. This unprecedented precision enables a rich physics programme, including high-precision tests of the Standard Model and searches for new phenomena. In this paper we demonstrate nuSTORM's sensitivity to key Standard Model processes such as, measurements of the weak mixing angle at low $Q^2$ and the rare process of neutrino trident production. We also show its powerful reach for a diverse range of beyond-the-Standard-Model scenarios, including eV-scale sterile neutrinos, Kaluza-Klein excitations from large extra dimensions and lepton flavour violation. Furthermore, nuSTORM can place significant constraints on heavy QCD axions and other axion-like particles produced in rare kaon decays. These capabilities establish nuSTORM as a powerful and complementary probe to long baseline experiments and collider searches.

    hep-phJHEP(2026)·4 citations
15. 15*

    Via Machinae 3.0: A search for stellar streams in Gaia with the CATHODE algorithm

    Anna Hallin🇩🇪 · David Shih🇺🇸 · Claudius Krause🇦🇹 · Matthew R. Buckley🇺🇸

    We apply the model-agnostic anomaly detection method Cathode - originally developed for particle physics - to search for stellar streams in Gaia data. We combine Cathode with Via Machinae 3.0: a re-optimized version of the stellar stream detection method that was previously applied to Gaia data together with the related anomaly detection technique Anode. We demonstrate that the combination of Via Machinae 3.0 with Cathode, called VM3-C, not only re-discovers previously known streams, but also confirms many candidate streams identified in combination with Anode (denoted VM3-A). Compared to VM3-A, the number of stream candidates detected by VM3-C increases by around 10%. Moreover, both of the methods discover the same two large clusters of stream candidates in the Northern Galactic hemisphere. We dub these highly significant anomalous structures the Raritan stream and the Passaic stream. These two structures may indicate the presence of larger objects, such as dwarf galaxy streams, or non-trivial orbital dynamics resulting in bifurcation or fanning, and are promising and high-priority targets for further analysis.

    ↳ astro-ph.GAhep-ph4 citations
16. 16*

    Wave-Breaking Phenomena in Quark-Gluon Plasma

    Biswarup Paul🇮🇳

    We investigate the onset of wave-breaking in the quark-gluon plasma (QGP) formed in heavy-ion collisions at both RHIC and the LHC. A nonlinear longitudinal color field is coupled to a three-dimensional viscous hydrodynamic background constrained by experimental conditions: Pb-Pb at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV (LHC) and Au-Au at $\sqrt{s_{\mathrm{NN}}}=200$ GeV (RHIC). The instantaneous wave-breaking threshold is determined from the in-medium plasma frequency, while the field evolution follows a nonlinear Landau equation with Debye screening and expansion damping. At the LHC, the higher initial temperature and density drive the system above the threshold within $\tau \lesssim$ 2.3 fm/$c$, whereas at RHIC the cooler and more dilute medium delays wave-breaking to $\tau \simeq 2.8$~fm/$c$. Scans over initial temperature, density, thermalization time, QGP lifetime, and collision system (RHIC vs LHC) confirm the robustness of this instability against parameter variations. These results identify wave-breaking as a universal microscopic mechanism for the early loss of coherence and rapid onset of hydrodynamics in the QGP, providing a common explanation for the fast equilibration observed at both RHIC and the LHC.

    ↳ nucl-thhep-phnucl-ex0 citations
17. 17*

    The IBM Description of the B(E2) Anomaly: Dynamical Triaxiality and Configuration Mixing

    Wei Teng · Sheng Nan Wang · Xian Zhi Zhao · Yu Zhang🇨🇳

    A theoretical investigation has been carried out to examine the effects of dynamical triaxility and configuration mixing on the $B(E2)$ anomaly, characterized by $B_{4/2}=B(E2;4_1^{+}\to 2_1^{+})/B(E2;2_1^{+}\to 0_1^{+})<1.0$ and $R_{4/2}=E(4_1^{+})/E(2_1^{+})\ge 2.0$, within the framework of the interacting boson model (IBM). The results indicate that the effective $\gamma$ deformation may undergo substantial changes with increasing angular momentum in the $B(E2)$ anomaly system governed by an IBM Hamiltonian involving rotor-like terms. Further calculations reveal that mixing between normal and intruder states may facilitate the emergence of $B(E2)$ anomaly, thereby providing additional theoretical insights into this unusual phenomenon.

    ↳ nucl-thhep-phNPA(2025)·5 citations
18. 18*

    Numerical Verification of Perturbative Schwinger-Dyson Resummation on Lattice Models

    Thomas Banks🇺🇸 · Anish Suresh🇺🇸

    We investigate an approximation to the Schwinger-Dyson (SD) equations of the collective Coulomb field of the large $N$ Homogeneous Electron Fluid. The large $N$ approximation transforms the infinite SD hierarchy into a set of closed, equations for 1 and 2-pt correlators. In this paper, the dynamics of a toy model -- a small, square Euclidean lattice with periodic boundary conditions -- are considered. The Markov Chain Monte Carlo numerical method evaluated the 1 and 2-pt correlation functions on a $2\times 2$ and $3\times 3$ lattice. The derived equations are checked with the correlator values, and an agreement at $N\sim 100$ to order $10^{-3}$ was found. The agreement can be further strengthened by increasing runs in the Markov Chain Monte Carlo method.

    ↳ cond-mat.str-elhep-lathep-phhep-th0 citations
19. 19*

    Search for a photon peak from keV-scale dark matter annihilation with NuSTAR: Constraints on $⟨\sigma v⟩$ after 11 years of observations

    E. I. Zakharov🇷🇺 · V. V. Barinov🇷🇺 · D. S. Gorbunov🇷🇺 · R. A. Krivonos🇷🇺 · A. A. Mukhin🇷🇺

    We report new constraints on the velocity-independent annihilation cross section $⟨\sigma v⟩$ of keV-scale dark matter particles based on 11 years of observations with the NuSTAR X-ray telescope. Using the unfocused stray light mode of the instrument, which provides a wide field-of-view and a stable instrumental background, we perform a sensitive search for photon signatures from dark matter annihilation in the Galactic halo. We model the resulting diffuse X-ray spectrum over the 3-20 keV energy range and search for line-like spectral features that may arise from the annihilation of dark matter particles into photons. No statistically significant excess over the expected astrophysical background is found. We therefore place upper limits on $⟨\sigma v⟩$ as a function of dark matter mass, assuming a velocity-independent s-wave annihilation and several Galactic dark matter profiles. Across most of the explored mass range our results provide the strongest X-ray constraints to date, reaching the level of $⟨\sigma v⟩\lesssim 10^{-33}$ -- $10^{-34}$ cm${}^3$ s${}^{-1}$, and they are complementary to the most recent bounds derived from SRG/ART-XC observations.

    ↳ astro-ph.HEastro-ph.COhep-phPRD(2025)·2 citations
20. 20*

    Gravitational radiation reaction around a static black hole surrounded by a Dehnen type dark matter halo

    Amjad Ashoorioon🇮🇷 · Roberto Casadio · Khadije Jafarzade · Mohammad B. Jahani Poshteh🇮🇷 · Orlando Luongo🇮🇹

    We consider the motion of a particle in the geometry of a Schwarzschild-like black hole embedded in a dark matter (DM) halo with Dehnen type density profile and calculate the orbital periods along with the evolution of the semi-latus rectum and eccentricity for extreme mass ratio inspirals (EMRIs). Such a system emits gravitational waves (GWs), and the particle's orbit evolves under radiation reaction. We also consider the effects of dynamical friction and accretion of DM on the orbital parameters. We find that the eccentricity and semi-latus rectum decrease faster with respect to the case in which EMRI is in empty spacetime.

    ↳ gr-qcastro-ph.COastro-ph.HEhep-ph+1JCAP(2026)·10 citations
21. 21*

    Lattice calculation of the Sn isotopes near the proton dripline

    Fabian Hildenbrand🇩🇪 · Serdar Elhatisari🇹🇷 · Ulf-G. Meißner🇩🇪 · Helen Meyer🇩🇪 · Zhengxue Ren🇩🇪 · Andreas Herten🇩🇪 · Mathis Bode🇩🇪

    We present the first $\text{ab initio}$ lattice calculations of the proton-rich tin isotopes ${}^{99}$Sn to ${}^{102}$Sn using nuclear lattice effective field theory with high-fidelity two- and three-nucleon forces. For a given set of three-nucleon couplings, we reproduce binding energies with $\sim 1\%$ accuracy for the even-even systems, and obtain energy splitting and two-nucleon separation energies in agreement with experiment. Our results confirm the $N=50$ shell closure and reveal that the binding energy of ${}^{99}$Sn lies below values extrapolated from heavier isotopes.

    ↳ nucl-thhep-lathep-phnucl-exPRL(2026)·13 citations
22. 22*

    Two-particle two-hole excitations in semi-inclusive neutrino-nucleus scattering

    Valerio Belocchi🇮🇹 · Maria Benedetta Barbaro🇮🇹 · Arturo De Pace🇮🇹 · Marco Martini🇫🇷

    A calculation of the two-particle two-hole contribution to the semi-inclusive $({\nu }_{\mu },{\mu }^{-}N)$ cross section on carbon is performed in the framework of the relativistic Fermi gas model. The process is driven by meson-exchange currents encompassing all contributions involving the exchange of a single pion and the excitation of a $\Delta$ resonance. The calculation is validated against the inclusive $({\nu }_{\mu },{\mu }^{-})$ response functions already existing in the literature, and then extended for the first time to the semi-inclusive channel. Results are presented both at fixed neutrino energy and folded with the T2K neutrino flux.

    ↳ nucl-thhep-exhep-phPRD(2025)·5 citations
23. 23*

    Attractor of hydrodynamic attractors

    Shile Chen🇨🇳 · Shuzhe Shi🇨🇳

    Understanding how hydrodynamics emerges rapidly in the medium produced by relativistic heavy-ion collisions remains a key theoretical challenge. While the attractor solution -- manifesting as a non-thermal fixed point during the early evolution stage -- offers a potential explanation, it does not fully account for how far-from-equilibrium systems quickly approach near-equilibrium states. In this Letter, we demonstrate that the attractor in a higher-order hydrodynamic theory converges to the same solution as a second-order theory before reaching the Navier--Stokes limit. This finding suggests that commonly used second-order hydrodynamic equations, provided they incorporate the correct transport coefficients, are adequate to approximate the system's behavior starting from an intermediate time -- even when using a higher-order theory that would be more suitable for describing the far-from-equilibrium evolution.

    ↳ nucl-thhep-phPRD(2026)·4 citations
24. 24*

    Real-Time String Dynamics in a $2+1$D Non-Abelian Lattice Gauge Theory: String Breaking, Glueball Formation, Baryon Blockade, and Tension Reduction

    Giovanni Cataldi🇩🇪 · Simone Orlando🇩🇪 · Jad C. Halimeh🇩🇪

    Understanding flux string dynamics can provide insight into quark confinement and hadronization. First-principles quantum and numerical simulations have mostly focused on toy-model Abelian lattice gauge theories (LGTs). With the advent of state-of-the-art quantum simulation experiments, it is important to bridge this gap and study string dynamics in non-Abelian LGTs beyond one spatial dimension. Using tensor network methods, we simulate the real-time string dynamics of a $2+1$D SU$(2)$ Yang--Mills LGT with dynamical matter. In the strong-coupling regime and at resonance, string breaking occurs through sharp Casimir reduction along with meson and baryon-antibaryon formation, a distinctively non-Abelian feature. At finite baryon density, we discover a \textit{baryon blockade} mechanism that delays string breaking. Away from resonance, the magnetic term drives purely non-Abelian fluctuations: glueball loops and self-crossed strings that resolve two SU$(2)$ intertwiners with distinct dynamics. For higher-energy strings, we uncover representation-dependent tension-reduction resonances. Our findings serve as a guide for upcoming quantum simulators of non-Abelian LGTs.

    ↳ hep-latcond-mat.quant-gascond-mat.stat-mechhep-ph+128 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.