Higher order light-cone distribution amplitudes of the Lambda baryon

TL;DR

This paper refines the theoretical understanding of Lambda baryon light-cone distribution amplitudes by calculating higher-order conformal contributions and providing explicit expressions using QCD sum rules.

Contribution

It introduces next-to-leading order conformal expansion coefficients for Lambda baryon LCDAs, incorporating twist 6 effects and explicit expressions derived from QCD sum rules.

Findings

Explicit expressions for Lambda baryon LCDAs are provided.

Next-to-leading order conformal coefficients are calculated.

Higher twist effects are included in the analysis.

Abstract

The improved light-cone distribution amplitudes (LCDAs) of the $\Lambda$ baryon are examined on the basis of the QCD conformal partial wave expansion approach. The calculations are carried out to the next-to-leading order of conformal spin accuracy with consideration of twist 6. The next leading order conformal expansion coefficients are related to the nonperturbative parameters defined by the local three quark operator matrix elements with different Lorentz structures with a covariant derivative. The nonperturbative parameters are determined with the QCD sum rule method. The explicit expressions of the LCDAs are provided as the main results.