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The first calculation of the response of the momentum space quark propagatorto center vortices in the ground state fields of QCD is presented. Centervortices are identified on 2+1-flavour dynamical gauge fields with $m_\pi\simeq 156$ MeV to obtain the vortex-removed and vortex-only quark propagator.Dynamical mass generation is found to vanish upon vortex removal, while thevortex-only field is able to generate dynamical mass. These new signaturessignificantly strengthen evidence that center vortices underpin both dynamicalchiral symmetry breaking and quark confinement.

Evidence that center vortices drive dynamical mass generation in QCD