Lattice QCD calculation of charmed baryon decay constants at continuum limit and physical mass

TL;DR

This paper presents a first-principles lattice QCD calculation of charmed baryon decay constants, achieving high precision through systematic extrapolations across multiple lattice spacings and pion masses.

Contribution

It is the first to compute charmed baryon decay constants using 2+1 flavor lattice ensembles with continuum and physical mass extrapolations.

Findings

Decay constants determined with 8-16% precision

Systematic chiral and continuum extrapolations performed

First-principles calculation of charmed baryon decay constants

Abstract

We present the first principle calculation of charmed baryon decay constants employing 2+1 flavor gauge ensembles with lattice spacings ranging from 0.05 to 0.1 fm and pion masses between 136 and 310 MeV. Under $SU(3)$ flavor symmetry, we construct the charmed baryon interpolating operators and compute the corresponding hadronic matrix elements to extract the bare decay constants for each ensemble. The non-perturbative renormalization is performed via the symmetric momentum-subtraction scheme. After performing systematic chiral and continuum extrapolations, we obtain the decay constants with a precision of $8\sim 16\%$ from first principles.