strong interaction, hadron physics, QCD sum-rules, chiral Lagrangians
Scale factor matrices relating mesonic fields in chiral Lagrangians and quark-level operators of QCD sum-rules are shown to be constrained by chiral symmetry, resulting in universal scale factors for each chiral nonet. Built upon this interplay between chiral Lagrangians and QCD sum-rules, the scale factors relating the a0 isotriplet scalar mesons to their underlying quark composite field were recently determined. It is shown that the same technique when applied to K∗0 isodoublet scalars reproduces the same scale factors, confirming the universality property and further validating this connection between chiral Lagrangians and QCD sum-rules which can have nontrivial impacts on our understanding of the low-energy QCD, in general, and the physics of scalar mesons in particular.
Source Publication Title
Modern Physics Letter A
World Scientific Publishing Company
Fariborz, A. H., Ho, J., & Steele, T. G. (2020). Universal Scale Factors Relating Mesonic Fields and Quark Operators. Modern Physics Letter A, 35 (21) https://doi.org/10.1142/S0217732320501734