Электронный каталог

Статья

Lutz, M.F.M.
Low-Energy Constants in the Chiral Lagrangian with Baryon Octet and Decuplet Fields from Lattice QCD Data on CLS Ensembles / M.F.M.Lutz, Yonggoo Heo, Xiao-Yu Guo // The European Physical Journal C [Electronic resource]. – 2023. – Vol.83, No.5. – P.440. – URL: https://doi.org/10.1140/epjc/s10052-023-11556-1. – Bibliogr.:54.

We perform an analysis of Lattice QCD data on baryon octet and decuplet masses based on the chiral SU(3) Lagrangian. Low-energy constants (LEC) are adjusted to describe baryon masses from a large set of CLS ensembles, where finite-box and discretization effects are considered. The set is successfully compared against previous Lattice QCD data from ensembles generated with distinct QCD actions by the ETMC, QCDSF-UKQCD and HSC groups. Discretization effects are modelled by the use of action and lattice-scale dependent leading orders LEC, where uniform values are imposed in the limit of vanishing lattice scales. From the CLS data set we extract a pion-nucleon sigma term, σπN=58.7(1.2) MeV, compatible with its empirical value.



ОИЯИ = ОИЯИ (JINR)2023
Спец.(статьи,препринты) = С 324.1д - Квантовая хромодинамика$
Спец.(статьи,препринты) = С 324.1г1 - Калибровочные поля на решетке$
Бюллетени = 41/023