Updated determination of light-cone distribution amplitudes of octet baryons in lattice QCD

Authors:
  • GBG. S. Bali
    G. S. Bali
  • VBV. M. Braun
    V. M. Braun
  • SBS. Bürger
    S. Bürger
  • MGM. Göckeler
    M. Göckeler
  • MGM. Gruber
    M. Gruber
  • FKF. Kaiser
    F. Kaiser
  • BKB. A. Kniehl
    B. A. Kniehl
  • OVO. L. Veretin
    O. L. Veretin
  • PWP. Wein
    P. Wein

Abstract
We present updated results on the wave function normalization constants and the first moments of the light cone distribution amplitudes for the lowest-lying baryon octet. The analysis is carried out on a large number of $n_f=2+1$ lattice gauge ensembles, including ensembles at physical pion (and kaon) masses. These are spread across five different lattice spacings, enabling a controlled continuum limit. The main differences with respect to our earlier work are the use of two-loop conversion factors to an $\overline{\mathrm{MS}}$-like scheme and of an updated set of low-energy constants in the parametrization of the quark mass dependence. As a byproduct, for the first time, the anomalous dimensions for local three-quark operators with one derivative are obtained.