2016•Physical review. D/Physical review. D.Open access

Renormalization of the low-energy constants of chiral perturbation theory from loops with dynamical vector mesons

Carla Terschlüsen, Stefan Leupold

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Abstract

Starting from a relativistic Lagrangian for pseudoscalar Goldstone bosons and vector mesons in the antisymmetric tensor representation, a one-loop calculation is performed to pin down the divergent structures that appear for the effective low-energy action at chiral orders ${Q}^{2}$ and ${Q}^{4}$. The corresponding renormalization-scale dependencies of all low-energy constants up to chiral order ${Q}^{4}$ are determined. Calculations are carried out for both the pseudoscalar octet and the pseudoscalar nonet, the latter in the framework of chiral perturbation theory in the limit of a large number of colors.

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Starting from a relativistic Lagrangian for pseudoscalar Goldstone bosons and vector mesons in the antisymmetric tensor representation, a one-loop calculation is performed to pin down the divergent structures that appear for the effective low-energy action at chiral orders ${Q}^{2}$ and ${Q}^{4}$. The corresponding renormalization-scale dependencies of all low-energy constants up to chiral order ${Q}^{4}$ are determined. Calculations are carried out for both the pseudoscalar octet and the pseudoscalar nonet, the latter in the framework of chiral perturbation theory in the limit of a large number of colors.

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Available abstract

Starting from a relativistic Lagrangian for pseudoscalar Goldstone bosons and vector mesons in the antisymmetric tensor representation, a one-loop calculation is performed to pin down the divergent structures that appear for the effective low-energy action at chiral orders ${Q}^{2}$ and ${Q}^{4}$. The corresponding renormalization-scale dependencies of all low-energy constants up to chiral order ${Q}^{4}$ are determined. Calculations are carried out for both the pseudoscalar octet and the pseudoscalar nonet, the latter in the framework of chiral perturbation theory in the limit of a large number of colors.

Key concepts: Pseudoscalar, Physics, Renormalization, Chiral perturbation theory, Antisymmetric tensor, Goldstone boson, Meson, Particle physics

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