Study of Doubly Heavy Baryon Spectrum via QCD Sum Rules

TL;DR

This paper uses QCD sum rules and a diquark model to calculate the mass spectrum of doubly heavy baryons, supporting the diquark picture's validity in describing these particles.

Contribution

It provides a detailed QCD sum rule calculation of doubly heavy baryon masses using a diquark model, including operators up to dimension six.

Findings

Results agree with other theoretical predictions.

Supports the diquark model as a valid approach.

Calculates mass spectrum within acceptable error margins.

Abstract

In this work, we calculate the mass spectrum of doubly heavy baryons with the diquark model in terms of the QCD sum rules. The interpolating currents are composed of a heavy diquark field and a light quark field. Contributions of the operators up to dimension six are taken into account in the operator product expansion. Within a reasonable error tolerance, our numerical results are compatible with other theoretical predictions. This indicates that the diquark picture reflects the reality and is applicable to the study of doubly heavy baryons.