Masses of excited heavy baryons in the relativistic quark-diquark picture

TL;DR

This paper calculates the mass spectra of excited heavy baryons using a relativistic quark-diquark model, achieving good agreement with experimental data and advancing understanding of baryon structure.

Contribution

It introduces a relativistic treatment of light diquarks and incorporates diquark-gluon interactions within the constituent quark model for heavy baryons.

Findings

Predicted mass spectra align well with experimental data.

Relativistic treatment improves accuracy of light diquark modeling.

Inclusion of diquark-gluon form factor enhances internal structure representation.

Abstract

The mass spectra of the excited heavy baryons consisting of two light (u,d,s) and one heavy (c,b) quarks are calculated in the heavy-quark--light-diquark approximation within the constituent quark model. The light quarks, forming the diquark, and the light diquark in the baryon are treated completely relativistically. The expansion in v/c up to the second order is used only for the heavy (b and c) quarks. The internal structure of the diquark is taken into account by inserting the diquark-gluon interaction form factor. An overall good agreement of the obtained predictions with available experimental data is found.