Speaker
Matthias F.M. Lutz
(GSI)
Description
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,
σ_πN = 58.7(1.2) MeV, compatible with its empirical value.
| Parallel Session | Low-Energy Nucleon Structure |
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Primary author
Matthias F.M. Lutz
(GSI)
Co-authors
Yonggoo Heo
Xiao-Yu Guo
