Chiral corrections to heavy quark-diquark symmetry predictions for doubly heavy baryon zero-recoil semileptonic decay

TL;DR

This paper calculates the leading chiral corrections to heavy quark-diquark symmetry predictions for doubly heavy baryon semileptonic decay form factors, aiding lattice QCD extrapolations.

Contribution

It derives the coupling between heavy diquarks and weak current and constructs the chiral Lagrangian for doubly heavy baryons in this context.

Findings

Derived chiral correction formulas for decay form factors.

Provided chiral extrapolation expressions for lattice QCD.

Analyzed corrections for both unquenched and partially quenched QCD.

Abstract

This paper studies the leading chiral corrections to heavy quark-diquark symmetry predictions for doubly heavy baryon semileptonic decay form factors. We derive the coupling between heavy diquarks and weak current in the limit of heavy quark-diquark symmetry, and construct the chiral Lagrangian for doubly heavy baryons coupled to weak current. We evaluate chiral corrections to doubly heavy baryon zero-recoil semileptonic decay for both unquenched and partially quenched QCD. This theory is used to derive chiral extrapolation expressions for measurements of form factors of doubly heavy baryon zero-recoil semileptonic decay in lattice QCD simulations.