Bridging a gap between continuum-QCD and ab initio predictions of hadron observables

By Daniele Binosi, Lei Chang, J. Papavassiliou, C. Roberts. 2014

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Preprint no. ADP-14-42/T901 Within contemporary hadron physics there are two common methods for determining the momentum-dependence of the interaction between quarks: the top-down approach, which works toward an ab initio computation of the interaction via direct analysis of the gauge-sector gap equations; and the bottom-up scheme, which aims to infer the interaction by fitting data within a well-d efined truncation of those equations in the matter sector that are r elevant to bound-state properties. We unite these two approaches by demonstrating that the renormalisation-group-invariant running-interaction predicted by contemporary analyses of QCD’s gauge sector coincides with that required in order to describe gro und-state hadron observables using a nonperturbative truncation of QCD’s Dyson-Schwinger equations in the matter sector. This bridges a gap that had lain between nonperturbative continuum-QCD and the ab initio prediction of bound-state properties.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/bebbe7e4862ac323ca176a53bdd439672549d80c