https://doi.org/10.1140/epjc/s10052-023-11556-1
Regular Article - Theoretical Physics
Low-energy constants in the chiral Lagrangian with baryon octet and decuplet fields from Lattice QCD data on CLS ensembles
1
GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291, Darmstadt, Germany
2
Bogoliubov Laboratory for Theoretical Physics, Joint Institute for Nuclear Research, 141980, Dubna, Moscow region, Russia
3
Faculty of Science, Beijing University of Technology, 100124, Beijing, China
Received:
17
January
2023
Accepted:
26
April
2023
Published online:
26
May
2023
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, 
MeV, compatible with its empirical value.
© The Author(s) 2023
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