Speaker
Description
The formalism of colour-Lorentz forces offers a novel approach to understanding the mechanisms that bind quarks into hadrons. We present a lattice QCD calculation of the transverse spatial distribution of the colour-Lorentz force acting on a struck quark in a proton. Utilising $N_f=2+1$ flavors of dynamical fermions at the SU(3) symmetric point across three lattice spacings, we identify a central, spin-independent confining force, alongside spin-dependent force distributions. The local forces are observed to exceed the scale associated with the QCD string tension, offering new insights into quark confinement and hadron structure. Further, our results are shown to provide a complementary perspective on the Sivers asymmetry observed in transversely polarized deep-inelastic scattering.
