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arXiv · 2211.04713

Triply charmed baryons mass decomposition from lattice QCD

Jin-Bo Li·Long-Cheng Gui·Wei Sun·Jian Liang·Wen Qin
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Abstract

We present the first calculation of the connected scalar matrix element and the momentum fraction of charm quark within the$\frac{3}{2}^{+}$ and $\frac{3}{2}^{-}$triply charmed baryons on lattice QCD. The results are based on overlap valence fermions on two ensembles of $N_f=2+1$ domain wall fermion configurations with two lattice spacings. The corresponding sea quark pion masses are $300$ MeV and $278$ MeV. The separated contributions to the triply charmed baryon mass are derived through the decomposition of the QCD energy-momentum tensor. The contribution of the connected charm quark matrix element to the triply charmed baryon is about 3/2 times that of the charmonium. And it contributes almost 70% of the total mass. The mass splitting of $\frac{3}{2}^{+}$ and $\frac{3}{2}^{-}$triply charmed baryons is mainly from $\langle H_{E}\rangle$ of the QCD energy-momentum tensor. A mass decomposition from the quark model is also studied for comparison.

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Jin-Bo Li, Long-Cheng Gui, Wei Sun, Jian Liang, Wen Qin. 2022-11-09. Triply charmed baryons mass decomposition from lattice QCD. https://arxiv.org/abs/2211.04713

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