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dc.contributor.authorCui, Zhu-Fang
dc.contributor.authorZhang, J. L.
dc.contributor.authorBinosi, Daniele
dc.contributor.authorRodríguez Quintero, José
dc.identifier.citationCui, Z. F., Zhang, J. L., Binosi, D. ... Rodríguez Quintero, J. (2020). Effective charge from lattice QCD. Chinese Physics C, 44(8), 083102. DOI:
dc.description.abstractUsing 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.es_ES
dc.publisherIOP Publishinges_ES
dc.relation.isversionofPublisher’s versión
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España
dc.subject.otherRunning couplinges_ES
dc.subject.otherQuantum chromodynamicses_ES
dc.subject.otherDyson-Schwinger equationses_ES
dc.subject.otherLattice field theoryes_ES
dc.subject.otherEmergence of masses_ES
dc.titleEffective charge from lattice QCDes_ES

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