Bonn 2020 – wissenschaftliches Programm
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HK 3.3: Vortrag
Montag, 30. März 2020, 17:15–17:30, J-HS M
Low-energy constants from charmed baryons on QCD lattices — Yonggoo Heo1, •Xiao-Yu Guo2, and Matthias F.M. Lutz2,3 — 1Suranaree University of Technology, Nakhon Ratchasima, Thailand — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany — 3Technische Universität Darmstadt, Darmstadt, Germany
We study the light quark-mass dependence of charmed baryon masses as measured by various QCD lattice collaborations. A global fit to such data based on the chiral SU(3) Lagrangian is reported on. All low-energy constants that are relevant at next-to-next-to-next-to-leading order (N3LO) are determined from the lattice data sets where constraints from sum rules as they follow from large-Nc QCD at subleading order are considered. The expected hierarchy for the low-energy constants in the 1/Nc expansion is confirmed by our global fits to the lattice data. With our results the low-energy interaction of the Goldstone bosons with the charmed baryon ground states is well constrained and the path towards realistic coupled-channel computations in this sector of QCD is prepared.