@article{10272/18630,
year = {2020},
month = {6},
url = {http://hdl.handle.net/10272/18630},
abstract = {Using lattice configurations for quantum chromodynamics (QCD) generated with three domain-wall fermions
at a physical pion mass, we obtain a parameter-free prediction of QCD ’s renormalisation-group-invariant process-
independent effective charge, α(k2). Owing to the dynamical breaking of scale invariance, evident in the emergence
of a gluon mass-scale, m0 = 0.43(1) GeV, this coupling saturates at infrared momenta: α(0)/π = 0.97(4) .
Amongst other things:α(k2)is almost identical to the process-dependent (PD) effective charge defined via the
Bjorken sum rule; and also that PD charge which, employed in the one-loop evolution equations, delivers agreement
between pion parton distribution functions computed at the hadronic scale and experiment. The diversity of unifying
roles played by α(k2) suggests that it is a strong candidate for that object which represents the interaction strength in
QCD at any given momentum scale; and its properties support a conclusion that QCD is a mathematically welldefined
quantum field theory in four dimensions.},
publisher = {IOP Publishing},
title = {Effective charge from lattice QCD},
doi = {10.1088/1674-1137/44/8/083102},
author = {Cui, Zhu-Fang and Zhang, J. L. and Binosi, Daniele and Rodríguez Quintero, José},
}