# Quark-diquark structure and masses of doubly charmed baryons

## TL;DR

This paper refines mass predictions for doubly charmed baryons by accounting for the finite size of the diquark, providing more accurate estimates for experimental searches at LHCb.

## Contribution

It introduces a correction for the finite size of the diquark in mass calculations of doubly charmed baryons, improving upon the local diquark approximation.

## Key findings

- Predicted masses: 3615±55 MeV for spin-1/2 states.
- Predicted masses: 3747±55 MeV for spin-3/2 states.
- Provides guidance for experimental searches at LHCb.

## Abstract

The finite size of doubly heavy diquark gives a positive correction to the masses of baryons calculated in the local diquark approximation. We evaluate this correction for the basic states of doubly charmed baryons to give quite accurate predictions actual for current searches of those baryons at LHCb: $m[{\Xi_{cc}^{1/2}}^{+}]\approx m[{\Xi_{cc}^{1/2}}^{++}]=3615\pm 55$ MeV and $m[{\Xi_{cc}^{3/2}}^{+}]\approx m[{\Xi_{cc}^{3/2}}^{++}]=3747\pm 55$ MeV.