The Chroma Software System for Lattice QCD

hep-lat 2026-07 conditional novelty 7.0 of 10

A tool-guided LLM agent generates lattice-QCD measurement workflows that reproduce expert implementations on 63/70 benchmark tasks at machine precision and enables new diagonal Wilson-line and multi-hadron computations.

hep-lat 2026-02 unverdicted novelty 7.0 of 10

Lattice QCD at the SU(3) symmetric point extracts energy levels for singlet and octet baryon-meson channels to inform the two-pole structure of Lambda(1405).

hep-lat 2025-09 conditional novelty 7.0 of 10

The fourth Mellin moment of the pion distribution amplitude is determined in the continuum limit for the first time in quenched QCD, giving <ξ^4> = 0.039(28)(11) at μ = 2 GeV.

hep-ph 2025-07 conditional novelty 7.0 of 10

A global fit of pion parton distributions including lattice gluon data reduces uncertainties on the high-x gluon PDF and indicates a gluon enhancement in the pion over the proton.

hep-lat 2025-02 conditional novelty 7.0 of 10

The first lattice QCD study of Lambda_c Lambda_c scattering finds a repulsive interaction with scattering length a0 = -0.21(4)(8) fm.

hep-lat 2025-02 unverdicted novelty 7.0 of 10

Lattice QCD at m_π≈391 MeV finds D1 bound state below D*π threshold strongly coupled in S-wave and D1' resonance in elastic D*π region for I=1/2 charmed channels.

hep-lat 2024-12 conditional novelty 7.0 of 10

Randomly displaced sparse grids inside distillation produce an unbiased estimator that makes local tetraquark operators affordable, with sampling noise already negligible at every-eighth-point spacing.

hep-ph 2025-07 conditional novelty 6.0 of 10

A variational autoencoder inverse mapper extracts the proton's gluon PDF from lattice QCD pseudo-Ioffe-time distributions, yielding results consistent with global fits.

hep-ph 2025-05 conditional novelty 6.0 of 10

Lattice QCD density-density correlations provide the first gauge-invariant spatial portraits of 1S, 1P, and exotic charmoniumlike states, showing relativistic radial structures and an S-wave color-octet c cbar plus gl...

hep-lat 2025-05 conditional novelty 6.0 of 10

A chiral singular value decomposition truncates an enlarged set of multigrid test vectors for Wilson fermions, reducing fine-level iterations by up to a factor of 1.7 at near-critical quark mass.

hep-lat 2025-02 conditional novelty 6.0 of 10

The first lattice QCD calculation of single-channel DD scattering finds a weakly repulsive S-wave isovector interaction and a slightly attractive P-wave isoscalar interaction.

hep-lat 2025-02 conditional novelty 6.0 of 10

This lattice QCD proceedings paper presents a stable analysis strategy and preliminary results for the isoscalar non-singlet axial form factor of the nucleon, with the full u+d-2s case on two ensembles.

hep-lat 2025-02 conditional novelty 6.0 of 10

The paper reports preliminary gradient-flow lattice results for the Weinberg and mixed susceptibilities, but statistical errors are too large to extract a useful Peccei-Quinn theta contribution.

hep-lat 2025-02 conditional novelty 6.0 of 10

Learned active loops improve spectral flow models, and correlated flow ensembles reduce statistical errors by 2-3x in Nf=2 QCD for the pion gluon momentum fraction, with a computational advantage after roughly 4,000 c...

hep-lat 2024-12 conditional novelty 6.0 of 10

The pion Boer-Mulders function is computed for the first time from lattice QCD and is found to decay with transverse separation, becoming compatible with zero around 0.5 to 0.6 fm.

hep-lat 2024-12 conditional novelty 6.0 of 10

A variational basis with nucleon-sigma interpolators reduces excited state contamination in direct lattice QCD determinations of nucleon sigma terms, demonstrated on one Nf=3 ensemble at M_pi=429 MeV.

hep-lat 2024-11 conditional novelty 6.0 of 10

First-principles lattice QCD decomposes baryon masses into quark sigma terms and a roughly flavor-independent gluon trace anomaly around 1 GeV.

hep-lat 2019-09 conditional novelty 6.0 of 10

Octet baryon matrix elements of octet currents obey a constrained SU(3) flavour-breaking expansion along the constant-singlet-mass trajectory, with one constraint at second order and no further constraints at third or...

hep-lat 2019-08 conditional novelty 6.0 of 10

A propagator sparsening algorithm that samples only one site per 4^3 block reproduces the ground-state masses and binding energies of hadrons and light nuclei from full lattice QCD correlators.

hep-lat 2025-05 conditional novelty 5.0 of 10

Using the Feynman-Hellmann approach in lattice QCD, the authors estimate the nucleon's isovector parton momentum fraction <x>_{u-d}=0.141(8) at mu^2=4 GeV^2 and the physical F2 moment 0.177(22) at Q^2 ~ 5 GeV^2, consi...

hep-lat 2025-02 conditional novelty 5.0 of 10

An SVD-based rank-k truncation of chirally split test vectors reduces Wilson fermion multigrid solve times on HSC and MILC ensembles.

hep-lat 2025-02 conditional novelty 5.0 of 10

Lattice QCD computes the transverse spatial distribution of the colour-Lorentz force on the struck quark in a proton, finding local forces up to about 3 GeV/fm, larger than the QCD string tension.

hep-lat 2025-01 conditional novelty 5.0 of 10

The authors derive and apply RG equations for the lattice spacing in 2+1 clover fermion QCD, finding only a small quark mass dependence and smoother lattice spacing ratios.

hep-lat 2024-12 accept novelty 5.0 of 10

RBC/UKQCD presents preliminary, unrenormalized lattice form factors for B_s to D*_s semileptonic decay on a single ensemble, covering a q^2 range similar to published calculations.

hep-lat 2024-11 conditional novelty 5.0 of 10

PyQUDA is a new Python wrapper that lets lattice QCD researchers call QUDA's GPU routines directly from Python.

hep-lat 2026-08 conditional novelty 4.0 of 10

A 13-ensemble lattice QCD calculation determines the nucleon isovector momentum fraction, helicity, and transversity moments at 2 GeV, with the transversity result standing as a first-principles prediction.