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arXiv · 1904.10705

Towards lattice-assisted hadron physics calculations based on QCD n-point functions

André Sternbeck·Milena Leutnant·Gernot Eichmann
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Abstract

We present preliminary lattice results for the nonperturbative tensor structure of the vector and axial-vector quark-antiquark vertices in QCD. Our lattice calculations are for $N_f=2$ mass-degenerate Wilson fermion flavors whose quark mass values include an almost physical one. We compare our lattice results with the corresponding continuum solutions of the inhomogeneous Bethe-Salpeter equations in a rainbow-ladder truncation. We find similarities in the momentum dependencies of the form factors but also clear deviations at low momentum.

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André Sternbeck, Milena Leutnant, Gernot Eichmann. 2019-04-24. Towards lattice-assisted hadron physics calculations based on QCD n-point functions. https://arxiv.org/abs/1904.10705

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