Chiral partner structure of doubly heavy baryons with heavy quark spin-flavor symmetry

TL;DR

This paper investigates the spectrum and transition properties of doubly heavy baryons using chiral partner structure and heavy quark symmetries, providing theoretical insights aligned with recent LHCb observations.

Contribution

It introduces a framework combining chiral partner structure with heavy quark spin-flavor symmetry to analyze doubly heavy baryons, including mass splittings and transition rates.

Findings

Mass splittings derived from generalized Goldberger-Treiman relation.

Estimated one-pion transition rates between baryon states.

Predicted radiative transition rates within multiplets.

Abstract

The spectrum of the doubly heavy baryons is estimated with respect to the new observation from the LHCb collaboration [Aaij:2017ueg] by using the chiral partner structure and heavy quark spin-flavor symmetry. The effects of heavy quark flavor symmetry breaking and light quark flavor symmetry are considered. The mass splitting of doubly heavy baryons with the same spin but opposite parity arises from the generalized Goldberger-Treiman relation. The intermultiplet one-pion transition and intramultiplet radiative transitions are also be estimated.