Relativistic QMD equations match exact mean-field forces
Density-dependent potentials now come from a variational derivation, not Monte-Carlo integration.
nucl-th
Nuclear Theory
Nuclear Theory Theory of nuclear structure covering wide area from models of hadron structure to neutron stars. Nuclear equation of states at different external conditions. Theory of nuclear reactions including heavy-ion reactions at low and high energies. It does not include problems of data analysis, physics of nuclear reactors, problems of safety, reactor construction
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Thermal shear cancels vorticity exactly in one spin formula
An analytic Gubser-flow model shows the sign puzzle has a formulation-dependent answer, including an exact zero.
New soft-gluon term dominates low-pT J/psi production
Outranks the usual color-octet shape functions by 1/v and depends on one well-measured constant.
· “The role of the soft scale for J/psi production in the transverse momentum dependent framework”
Color-superconducting gap may be half the accepted size
A renormalization-group treatment with quark self-energy fixes the pairing gap's coefficient, halving the standard value.
· “Renormalization group analysis of color superconductivity revisited”
Neutron quarkyonic matter goes ferromagnetic below 5.5n0
An attractive spin interaction makes neutron matter self-polarize near 5.5n0, a possible magnetar seed.
Pairing gap from repulsion scales as ℓ
Zero-sound resummation of the Kohn anomaly makes high-partial-wave pairing exponentially stronger.
Pion cloud sets proton's TMD tail with no free parameters
The d-bar minus u-bar asymmetry falls exponentially at large transverse separation, something perturbative QCD cannot produce.
Fluctuating magnetic fields always boost low-energy fusion
The mechanism could resolve the lithium problem by altering 7Be reaction rates in the early universe or in the lab.
· “Light nuclei under magnetic field and the lithium problem”
Hydrodynamics alone fails p+Pb spin-polarization test
Shear and vorticity contributions cancel to a negative signal where data show positive, in every equilibrium scenario.
· “Hydrodynamic effects on spin polarization along the beam direction in Au+Au and p+Pb collisions”
Neutron star data set a ceiling on the quark-pairing gap
Updated X-ray and gravitational-wave observations leave the 95% bound on the dense-matter pairing gap nearly unchanged.
· “Updated Astrophysical Equation-of-State Constraints on the Color-Superconducting Gap”
Neutron-star matter must stiffen
A 2.35-solar-mass pulsar and causality force a stiff first segment, then a soft second; phase transitions appear only at the top.
Hidden-strangeness baryon decays mostly to KΛ(1405)
Loop-based widths put πN*(1535) on par with πN, making KπΣ final states a realistic search channel.
Hadronic matter beats quark matter to eight times nuclear density
Quark onset and chiral restoration part ways when repulsion is shared by both phases.
· “Suppression of dynamical momentum-space shell by chiral symmetry”
Neutron dark decay survives in stars with tuned symmetry energy
Tuning the nuclear symmetry energy and dark-sector repulsion keeps 2-solar-mass neutron stars compatible with the decay channel.
· “Neutron Dark Decay in Neutron Stars: The Role of the Symmetry Energy”
Flow ratio near target rapidity exposes light-nucleus shape
In Pb+O and Pb+Ne collisions, v2/v3 in the 2<η<5 window best separates spherical, deformed, and alpha-clustered 16O and 20Ne.
· “A comparison study of collisions at relativistic energies involving light nuclei”
P-wave wins over spin-triplet pairing in dense quark matter
A helicity-amplitude analysis of one-gluon exchange revises which condensate forms when only one quark flavor pairs.
Neutron stars: most nucleon mass arises beyond chiral symmetry
Mass–radius data from compact stars force the chiral-invariant mass above half the proton mass.
· “Implication of neutron star observations to the origin of nucleon mass”
Neutron stars may be dark matter wrapped in a nucleonic shell
If 1% of neutron decays emit an electron but no proton, compact stars would be mostly dark fermions.
Pionless EFT predicts charged-nucleus scattering lengths
At next-to-leading order, minimal nuclear forces match measured phase shifts in three charged-scattering channels.
Thermodynamically correct phase rules thicken HESS J1731-347's crust 50%
The crust-core boundary shifts to about twice saturation density, multiplying crustal mass and moment of inertia.
One quark coupling swings merger damping up to 20x
Doubling the vector interaction shifts quark-core damping 3-20x, yet it still mimics nuclear matter.
· “Bulk Viscosity of Two-Flavor Color Superconducting Quark Matter in Neutron Star Mergers”
Dark matter in quark stars can explain two odd compact objects
Light dark matter forms halos, heavy dark matter forms cores; both known objects fall in the allowed ranges.
· “Dark matter effects on the properties of quark stars and the implications for the peculiar objects”
Zc(3900) pole position decides if DDD* is bound
Measure the Zc(3900) pole: it tells whether the three-hadron DDD* state is bound or not.
· “Constraining the DDD^* three-body bound state via the Z_c(3900) pole”
Block Lanczos supersedes GEVP for lattice QCD spectra
One GEVP solve is a single Lanczos step; further steps converge faster and give two-sided error bounds.
· “Block Lanczos algorithm for lattice QCD spectroscopy and matrix elements”
Invert truncated nuclear spectra to get scattering phase shifts
Discrete energies from standard many-body codes become phase shifts and resonances, including non-perturbative Coulomb
· “Constructing Effective Interactions via Projection-Based Inversion”
Small momentum kicks dominate early plasma jet broadening
Kinetic-theory simulations show pre-equilibrium plasmas deflect jets more gently than equilibrium physics predicts.
· “Jet momentum broadening beyond the jet quenching parameter from QCD kinetic theory”
FOPI flow data pin down m* and in-medium cross section to 15%
Bayesian fit of UrQMD to FOPI v1, v2, and stopping gives m*/m0 ≈ 0.78–0.88 and F ≈ 0.75–0.88.
· “Bayesian analysis of properties of nuclear matter with the FOPI experimental data”
Small neutron star radius: 85% of nucleon mass is chiral-invariant
It means under 15% of a proton's mass comes from spontaneous chiral symmetry breaking.
· “Origin of nucleon mass in the light of PSR J0614-3329 with quark-hadron crossover”
Sub-GeV dark matter can make quark stars fit every constraint
Strange quark stars with 100-150 MeV dark matter match pulsar and GW limits; 5 GeV dark matter fails.
Hadronic vacuum polarization ratio in muonic atoms holds near 67%
Relativistic calculation finds HVP reaches 68% of muon-VP at high Z; spikes trace nuclear radii.
Scalar glueball radius pegged at 0.263 fm
First lattice calculation of glueball gravitational form factors puts its mass radius below those of known hadrons.
SMASH maps hot, dense nuclear matter from 2.4 to 200 GeV
One transport code explains flow, clusters, and dileptons across the heavy-ion energy scan.
· “SMASH: Results from hadronic transport for heavy-ion collisions at high densities”
Sigma-zero flow can pin down the repulsive Sigma force in dense matter
A clean observable to constrain the uncertain Sigma hyperon potential, bridging heavy-ion flow and neutron-star physics.
Dilepton v2 from decays flips sign at high pT
A magnetic-field imprint survives in central collisions; annihilation dominates yield but decays carry the distinctive shape.
· “Dilepton Spectra and Even Flow Harmonics in a Magnetized QGP: An Ideal Hydrodynamic Study”
Renormalized Yukawa model yields finite
Counterterms make the spectrum and parton densities finite while block-encoding cost grows only ~50 percent.
Quark Pauli blocking may explain di-J/ψ bumps
A quantum-statistics effect would mimic a tetraquark: look for a dip, not a peak, near 6.4 GeV.
· “Di-J/psi structures from the quark Pauli-blocking effect”
Quark model finds narrow tetraquark resonances in two heavy sectors
Predicted masses 8.87–9.36 GeV and 12.13–12.45 GeV come with golden decay channels for experiments.
· “Triply heavy tetraquarks bar{b}cbar{q}c and bar{c}bbar{q}b in a constituent quark model”
Adjoint quarkonium correlators equal rescaled fundamental ones
If right, quarkonium diffusion coefficients are just Casimir multiples of the heavy-quark value.
Bottomonia survive hot QCD with unchanged masses to 251 MeV
Thermal widths grow with temperature and state size, reshaping how quarkonium melts in heavy-ion collisions.
· “In-medium bottomonium properties from lattice NRQCD calculations with extended meson operators”
DD-ME2 deformation beats alternatives for A≈70 half-lives
Feeding DD-ME2's quadrupole deformation into pn-QRPA matches measured lifetimes across eight rp-process nuclei.
· “Reexamination of nuclear structure properties and shape coexistence of nuclei around A70”
Rotation can strengthen chiral symmetry breaking in quark matter
Fitting the quark model's coupling to lattice data reverses rotation's effect and lifts the critical endpoint.
· “Chiral vortical catalysis constrained by LQCD simulations”
New K radii: isospin breaking in A=38 is zero within error
Precise isotope-shift calculations benchmark the corrections needed to extract Vud from superallowed beta decays.
Strong fields boost magnetar neutrino absorption tenfold
At fields above 10^16 gauss, quantum electron levels create density resonances and lift Pauli blocking in merger ejecta.
· “Effects of Landau quantization on neutrino emission and absorption”
Oxygen-oxygen collisions get a 5% no-quenching baseline
NLO QCD pins down the untouched hadron spectrum at 20–70 GeV, so LHC deviations signal quark-gluon plasma.
· “Energy loss baseline for light hadrons in oxygen-oxygen collisions at sqrt{s_NN}=5.36\,TeV”
Isotropized kernel overestimates early soft-gluon splitting by 300%
Full anisotropic kernel from QCD kinetic theory says early-time jets undergo less jet quenching than thermal estimates.
· “Jet broadening and radiation in the early anisotropic plasma in heavy-ion collisions”
Persistent homology proves viable for heavy-ion collisions
Betti curves reproduce flow and multiplicity physics, with no sensitivity gain over standard observables.
· “Towards a topological data analysis for heavy-ion collisions”
Hydro model fits Lambda spin in Au+Au
The same shear-induced polarization picture works for large collisions, so the similar p+Pb signal points to missing small-system physics.
· “Local spin polarization of Λ hyperons and its interaction corrections”
Central charge c=1 pins gluons to x^{-1/3}
Exact Bethe-Ansatz calculation puts the proton's gluon growth at x^{-1/3}, a target the EIC can test.
· “Small x behavior in QCD from maximal entanglement and conformal invariance”
Network geometry catches bad equation-of-state fits >90% of the time
Topological patterns in hidden layers separate good from bad equation-of-state inference without needing the true answer.
Surface vibration mimics static deformation in collisions
Zero-point shape fluctuations of 58Ni and 208Pb produce distinct eccentricity distributions, so flow data cannot assume static deformation.
· “Probing surface vibration of spherical nuclei in relativistic heavy-ion collisions”
Including neutron-proton imbalance improves low-energy scattering fits
Proton scattering data below about 65 MeV prefer mixing neutron-matter and symmetric-matter nuclear forces.
Heavy-lepton hydrogen molecules bind at -5.4 and -33.8 keV
First estimates for ppμ−μ− and ppτ−τ− give concrete energies that muon and tau facilities could search for.
Lattice QCD sets chiral critical endpoint below 103 MeV or absent
Baryon-number cumulants and Lee-Yang zeros put an 84% probability on the endpoint's temperature.
Six particle-pair spectra trace five predicted resonances
Dips and bumps in six pair-correlation spectra would fingerprint three Lambda* and two Sigma* states.
Gapless 2SC phase appears between normal and gapped quark matter
A general NJL model with charge and color neutrality identifies the dominant channels and a critical endpoint at 312 MeV.
Dimuons from Z0 decay could expose the fireball's magnetic field
In strong fields, Z0 decay pairs could leave the reaction plane and push antimuons to higher momentum than muons.
Neutron-star superflow can carry normal mass even at absolute zero
A gapless superfluid adds a mass-carrying normal component at T=0 and shrinks the reservoir behind pulsar glitches.
· “Gapless superfluidity in neutron stars: Normal-fluid fraction”
Double-beta decay amplitude predicted at next-to-leading order
First uncertainty-quantified EFT value for the elementary decay process could shrink nuclear matrix element errors.
· “Next-to-leading-order prediction for the neutrinoless double-beta decay”
AI fit finds the missing 28Si toroidal peaks
A Gaussian mixture analysis of 7-alpha spectra finds peaks near 114 and 138 MeV in both disputed datasets.
· “AI-Assisted analysis of ²⁸Si^* rightarrow 7α break-up data”
K=7 is the cutoff that fixes the ppp correlation tail
With up to 23 coupled channels, the calculated ppp tail matches the measured one within about two standard deviations.
· “Convergence of the ppp correlation function within the hyperspherical adiabatic basis”
Radial-flow fits get a hotter freeze-out from v0(pT)
Blast-wave model with flow and temperature fluctuations explains the new v0(pT) data and yields hotter freeze-out than pT-spectra fits.
· “Study of p_T-differential radial flow in blast-wave model”
India's decade for compact-object astrophysics
AstroSat, uGMRT, XPoSat and future detectors can probe dense matter and extreme gravity.
· “Astrophysics with Compact Objects: An Indian Perspective, Present Status and Future Vision”
Imaginary rotation turns fermion temperature into a fractal
At rational p/q, Dirac fermions cool to T/q; the chemical potential stays put.
Pulsar's 709 Hz spin tightens neutron-star equation of state
Ignoring rotation skews dense-matter inference; with spin included, the star's true non-rotating mass drops to ~2.1 solar masses.
· “PSR J0952-0607: Probing the Stiffest Equations of State and r-Mode Suppression Mechanisms”
A neutron pair explains the disputed 8^- isomer in nobelium-254
The same calculation predicts a low-energy 0+ pairing vibration that would test neutron pairing at N=152.
· “Low-energy spectra of nobelium isotopes: Skyrme random-phase-approximation analysis”
HAL QCD binding energies survive the left-hand cut
Even when a bound state sits on the pion-exchange cut, the HAL QCD pole converges to the exact binding momentum.
Chiral dynamics still underpins low-energy QCD
A status review shows pion-pion, nuclear, and Big Bang results all still need the chiral QCD framework.
A density-only functional reproduces deformed 20Ne
Trained on random potentials, it matches Kohn-Sham deformation and energies without single-particle orbitals.
Vector-meson spin alignment starts only at second order
Local-equilibrium statistical operator gives ρ00=1/3 to first order; shear and vorticity act only at second order.
· “Spin alignment of vector mesons in local equilibrium by Zubarev's approach”
Knockout reactions reveal what exotic nuclei are made of
Distorted-wave theory plus CDCCIA maps measured cross sections to orbits, pairs, and alpha clusters.
· “Reaction mechanism of quasi-free knockout processes in exotic RI beam era”
New projections make all eight gluon GPDs computable on the lattice
Exact projections let first-principles lattice QCD reach all eight gluon GPDs.
Black holes form by four channels
3D simulations trace energetic explosions, late fallback, aborted blasts, and quiet collapse to stellar-mass black holes.
Timelike hyperon form factors: theory fits
Review says final-state interactions set threshold shapes and vector-meson models set the continuum; the open problems are experimental.
· “Electromagnetic form factors of hyperons in the timelike region: A short review”
Forcing parton sum rules to survive collapses QCD scales to one
The usual two-scale uncertainty estimate works only if sum rules and coupling are corrected along the way.
· “What are the consequences of independent factorization and renormalization scales?”
Elastic scattering data pin an astrophysical (α,n) reaction to ~50%
One modest elastic-scattering run, three energies, constrains the 6.2 MeV 86Sr(α,n) cross section to a factor ~1.5.
Ten atoms can behave like a fluid
A task-force report argues that hydrodynamics can emerge without scale separation, from few-fermion gases to hot quark-gluon plasmas.
· “Few is different: deciphering many-body dynamics in mesoscopic quantum gases”
Rho-proton scattering length: 0.23 fm
A factor-of-four gap between rho-N and omega-N couplings that hadron-structure models will have to explain.
· “rho-Meson Nucleon Scattering Length from CLAS Threshold Photoproduction Measurements”
Neutrinos get trapped by 2SC quark matter in merger cores
Down-quark absorption is blocked until heat or energy opens it, leaving strange quarks to trap neutrinos within meters.
· “Neutrino absorption in two-flavor color-superconducting quark matter”
Argon's weak radius pinned to 3.452 fm
CREX's calcium measurement plus a tight calcium-argon correlation gives CEvNS experiments a 1% coherence-loss baseline.
Lattice QCD predicts a bound tetraquark at physical pion mass
Same first-principles method maps an attractive nucleon-charmonium force and a charm dibaryon near unitarity.
· “Recent progress on charmed hadron interactions from lattice QCD”
