Binosi, DanieleRoberts, Craig D.Rodríguez Quintero, José2019-03-122019-03-122017Binosi, D., Roberts, C. D., & Rodríguez-Quintero, J. (2017). Scale-setting, flavor dependence, and chiral symmetry restoration. Physical Review D, 95(11). https://doi.org/10.1103/physrevd.95.1140092470-0010http://hdl.handle.net/10272/16073We determine the flavour dependence of the renormalisation-group-invariant running interaction through judicious use of both unquenched Dyson-Schwinger equation and lattice results for QCD’s gauge-sector two-point functions. An important step is the introduction of a physical scale setting procedure that enables a realistic expression of the e ect of di erent numbers of active quark flavours on the interaction. Using this running interaction in concert with a well constrained class of dressed–gluon-quark vertices, we estimate the critical number of active lighter-quarks above which dynamical chiral symmetry breaking becomes impossible: ncr f 9; and hence in whose neighbourhood QCD is plausibly a conformal theory.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/Dynamical chiral symmetry breakingDyson-Schwinger equationsGluon-quark vertexNon-Abelian gauge-sector dynamicsNumerical simulations of lattice-regularised QCDjournal article10.1103/PhysRevD.95.114009open access