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arXiv · 2512.20372

Lattice QCD calculation of charmed baryon decay constants at continuum limit and physical mass

Lei-Yi Li·Jie Ran·Meng-Chu Cai·Hao-Fei Gao·Yu Gu·Xue-Ying Han·Jun Hua·Jin-Xin Tan·Guang-Yu Wang·Wei Wang·Fanrong Xu·Yi-Bo Yang·Qi-An Zhang
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Abstract

We present the first principle calculation of charmed baryon decay constants employing 2+1 flavor gauge ensembles with lattice spacings ranging from 0.05 to 0.1 fm and pion masses between 136 and 310 MeV. Under $SU(3)$ flavor symmetry, we construct the charmed baryon interpolating operators and compute the corresponding hadronic matrix elements to extract the bare decay constants for each ensemble. The non-perturbative renormalization is performed via the symmetric momentum-subtraction scheme. After performing systematic chiral and continuum extrapolations, we obtain the decay constants with a precision of $8\sim 16\%$ from first principles.

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Lei-Yi Li, Jie Ran, Meng-Chu Cai, Hao-Fei Gao, Yu Gu, Xue-Ying Han, Jun Hua, Jin-Xin Tan, Guang-Yu Wang, Wei Wang, Fanrong Xu, Yi-Bo Yang, Qi-An Zhang. 2025-12-23. Lattice QCD calculation of charmed baryon decay constants at continuum limit and physical mass. https://arxiv.org/abs/2512.20372

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