Spectroscopy of triply-charmed baryons from lattice QCD

TL;DR

This study uses lattice QCD to compute the excitation spectrum of triply-charmed baryons, revealing states consistent with SU(6)X O(3) symmetry and analyzing energy splittings including spin-orbit effects.

Contribution

It provides the first detailed lattice QCD calculation of triply-charmed baryon spectra including dynamical light quarks and spin-orbit splitting analysis.

Findings

Spectrum includes states up to spin 7/2.

Low-lying states match SU(6)X O(3) symmetry expectations.

Energy splittings are consistent with heavy quark limit models.

Abstract

The spectrum of excitations of triply-charmed baryons is computed using lattice QCD including dynamical light quark fields. Calculations are performed on anisotropic lattices with temporal and spatial spacings a_t = 0.0351(2) and a_s ~ 0.12 fm respectively and with pion mass of about 390 MeV. The spectrum obtained has baryonic states with well-defined total spin up to 7/2 and the low-lying states closely resemble the expectation from models with an SU(6)X O(3) symmetry. Energy splittings between extracted states, including those due to spin-orbit coupling in the heavy quark limit are computed and compared against data at other quark masses.