REVIEW 6 cited by
Non-perturbative strong coupling at timelike momenta
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
read the original abstract
We compute the strong coupling constant of Landau gauge QCD in the full complex momentum plane, both directly and via spectral reconstruction. In particular, we consider the Taylor coupling given by the product of ghost and gluon dressing functions. Assuming spectral representations for the latter, we first show that also the coupling obeys such a representation. The subsequent spectral reconstruction of the coupling data, obtained from 2+1 flavour lattice QCD results for the ghost and gluon, is based on a probabilistic inversion of this representation using Gaussian process regression with analytically enforced asymptotics. In contradistinction, our direct calculation relies on earlier reconstruction results for the ghost and gluon spectral functions themselves, as well as data obtained in functional QCD. Apart from its relevance for studies of resonances or scattering processes, the calculation also serves as a non-trivial benchmark of our reconstruction approach. The results show remarkable agreement, testifying to the reliability of the method.
Forward citations
Cited by 6 Pith papers
-
The QCD moat regime and its real-time properties
A first computation of the pion spectral function in the QCD moat regime reveals a quasiparticle peak at nonzero spacelike momentum, the moaton, and indicates no instability toward inhomogeneous chiral condensation fo...
-
The causal structure of the quark propagator
In a spectral DSE computation, the quark propagator develops complex-conjugate poles when the classical quark-gluon vertex strength exceeds a critical value, while the full QCD strength is predicted to stay below that value.
-
Asymptotic gauge symmetry and UV extension of the nonperturbative coupling in holographic QCD
A holographic effective strong coupling with momentum-dependent confinement strength and ultraviolet boundary conditions reproduces alpha_s data at all scales and gives alpha_s(MZ) = 0.1161 +/- 0.0017.
-
A simple non-parametric reconstruction of parton distributions from limited Fourier information
A fixed-hyperparameter Gaussian-process prior recovers parton distributions from limited Ioffe-time data and yields more realistic small-x uncertainties than simple parametric fits.
-
Toward inclusive observables with staggered quarks: the smeared $R$~ratio
A pilot lattice QCD calculation shows that staggered quarks, with even/odd time-slice separation, produce a smeared R ratio that roughly matches the Bernecker-Meyer model below 1 GeV.
-
Gluon mass scale through the Schwinger mechanism
A comprehensive review showing how massless composite poles in QCD vertices can generate the gluon mass scale, with a BSE-based computation reaching m=367 MeV against the 354 MeV lattice value.
Discussion (0). Continue with ORCID to comment.