TY  - JOUR
AU  - Binosi, D.
AU  - Chang, L.
AU  - Papavassiliou, J.
AU  - Qin, S. X.
AU  - Roberts, C. D.
PY  - 2017
DA  - 2017//
TI  - Natural constraints on the gluon-quark vertex
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 031501
EP  - 7pp
VL  - 95
IS  - 3
PB  - Amer Physical Soc
AB  - In principle, the strong-interaction sector of the standard model is characterized by a unique renormalization-group-invariant (RGI) running interaction and a unique form for the dressed-gluonquark vertex, Gamma mu; but, whilst much has been learnt about the former, the latter is still obscure. In order to improve this situation, we use a RGI running-interaction that reconciles top-down and bottom-up analyses of the gauge sector in quantum chromodynamics (QCD) to compute dressed-quark gap equation solutions with 1,660,000 distinct Ansatze for Gamma mu. Each one of the solutions is then tested for compatibility with three physical criteria and, remarkably, we find that merely 0.55% of the solutions survive the test. Evidently, even a small selection of observables places extremely tight bounds on the domain of realistic vertex Ansatze. This analysis and its results should prove useful in constraining insightful contemporary studies of QCD and hadronic phenomena.
SN  - 2470-0010
UR  - http://arxiv.org/abs/1609.02568
UR  - https://doi.org/10.1103/PhysRevD.95.031501
DO  - 10.1103/PhysRevD.95.031501
LA  - English
N1  - WOS:000393507500001
ID  - Binosi_etal2017
ER  -