On the construction of ${\cal N}=4$ SYM effective action beyond leading low-energy approximation

TL;DR

This paper investigates the construction of the ${ m N}=4$ SYM effective action beyond the leading low-energy approximation by exploring hidden ${ m N}=2$ supersymmetry in harmonic superspace, focusing on the $F^6$ term.

Contribution

It develops a method to incorporate deformed hidden ${ m N}=2$ supersymmetry to accurately construct the ${ m N}=4$ supersymmetric effective action including the $F^6$ term.

Findings

Constructed the hypermultiplet-dependent contributions for the $F^6$ term.

Achieved a self-consistent ${ m N}=4$ supersymmetric functional with $F^{6}$.

Extended the understanding of effective actions beyond leading order in ${ m N}=4$ SYM.

Abstract

A problem of the hidden ${\cal N}=2$ supersymmetry deformation for next-to-leading terms in the effective action for ${\cal N}=4$ SYM theory is discussed. Using formulation of the theory in ${\cal N}=2$ harmonic superspace and exploring the on-shell hidden ${\cal N}=2$ supersymmetry of ${\cal N}=4$ SYM theory, we construct the appropriate hypermultiplet-depending contributions for $F^6$ term in the Schwinger-De Witt expansion of the effective action. The procedure involves deformed hidden ${\cal N}=2$ supersymmetry and allows one to obtain self-consistently the correct ${\cal N}=4$ supersymmetric functional containing $F^{6}$ among the component fields.