Speaker
Dr
Yonggoo Heo
(Suranaree Univ. of Technology)
Description
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 (N$^3$LO) are determined from the lattice data sets where constraints from sum rules as they follow from large-$N_c$ QCD at subleading order are considered[1, 2]. The expected hierarchy for the low-energy constants in the $1/N_c$ 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.
[1] Y. Heo, M. F.M. Lutz, Phys.Rev. D97 (2018) no.9, 094004.
[2] Y. Heo, X.-Y. Guo, M. F.M. Lutz, Phys.Rev. D98 (2018) no.5, 054012
Primary author
Dr
Yonggoo Heo
(Suranaree Univ. of Technology)
Co-authors
Prof.
Matthias F.M. Lutz
(GSI Helmholtzzentrum)
Dr
Xiao-Yu Guo
(GSI-HELMHOLTZZENTRUM)
