Nonperturbative quark, gluon, and meson correlators of unquenched QCD
By Anton K. Cyrol, Mario Mitter, Jan M. Pawlowski, Nils Strodthoff. 2017
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We present non-perturbative first-principle results for quark-, gluon- and meson $1$PI correlation functions of two-flavour Landau-gauge QCD in the vacuum. These correlation functions carry the full information about the theory. They are obtained by solving their Functional Renormalisation Group equations in a systematic vertex expansion, aiming at apparent convergence. This work represents a crucial prerequisite for quantitative first-principle studies of the QCD phase diagram and the hadron spectrum within this framework. In particular, we have computed the gluon, ghost, quark and scalar-pseudoscalar meson propagators, as well as gluon, ghost-gluon, quark-gluon, quark, quark-meson, and meson interactions. Our results stress the crucial importance of the quantitatively correct running of different vertices in the semi-perturbative regime for describing the phenomena and scales of confinement and spontaneous chiral symmetry breaking without phenomenological input.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/0e79667e8048ff7bd2c42e9777a73ba59b710b70
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In Nuclear and High Energy Physics
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- The nonperturbative functional renormalization group and its applications (2020, methodology): “e fixing part gf ˇS gf[A¯;a] + S ghost[A¯;a;c;¯c]: (79b) While this underlying assumption has been checked to hold quantitatively in QCD for scales k & 1GeV for the above mentioned matter terms in [713,718], respective checks for the pure gauge field dynamics are still lacking, and are highly warr”