Calculating loops without loop calculations: NLO computation of pentaquark correlators

TL;DR

This paper introduces a modular configuration space method to compute NLO QCD corrections to pentaquark correlators, simplifying complex loop calculations and enabling easier extension to multiquark systems.

Contribution

The authors develop and demonstrate a modular technique in configuration space for calculating NLO corrections, avoiding traditional loop calculations in pentaquark studies.

Findings

Explicit NLO results for various pentaquark currents

Method simplifies NLO calculations in multiquark correlators

Technique adaptable to arbitrary multiquark systems

Abstract

We compute next-to-leading order (NLO) perturbative QCD corrections to the correlators of interpolating pentaquark currents. We employ modular techniques in configuration space which saves us from the onus of having to do loop calculations. The modular technique is explained in some detail. We present explicit NLO results for several interpolating pentaquark currents that have been written down in the literature. Our modular approach is easily adapted to the case of NLO corrections to multiquark correlators with an arbitrary number of quarks/antiquarks.