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arXiv · 1906.07497

Low-energy constants from charmed baryons on QCD lattices

Yonggoo Heo·Xiao-Yu Guo·Matthias F. M. Lutz
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Abstract

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-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.

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Yonggoo Heo, Xiao-Yu Guo, Matthias F. M. Lutz. 2019-06-18. Low-energy constants from charmed baryons on QCD lattices. https://doi.org/10.1103/physrevd.101.054506

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