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arXiv · 2502.05546

Lattice QCD study of $\Lambda_c \Lambda_c$ scattering

Hanyang Xing·Yiqi Geng·Chuan Liu·Liuming Liu·Peng Sun·Jiajun Wu·Zhicheng Yan·Ruilin Zhu
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Abstract

We present the first lattice result of the near threshold $\Lambda_c\Lambda_c$ scattering with $I(J^P) = 0(0^+)$. The calculation is performed on two $N_f = 2+1$ Wilson-Clover ensembles with pion mass $m_\pi \sim 303$\,MeV and lattice spacing $a = 0.07746$\,fm. The L\"uscher's finite volume method is utilized to extract the scattering parameters from the finite-volume spectrum. The coupled channel $\Xi_{cc}N$ is ignored in the scattering analysis based on the observation that the energy levels computed from the $\Lambda_c\Lambda_c$ and $\Xi_{cc}N$ operators do not mix. The $\Sigma_c\Sigma_c$ channel is not included either since the energy range explored in this study is well below its threshold. Our results indicate that the interaction in the $\Lambda_c\Lambda_c$ single channel is repulsive, and the scattering length is determined to be $a_0 = -0.21(4)(8)$\,fm, where the first error is the statistical error and the second is the systematic error.

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Hanyang Xing, Yiqi Geng, Chuan Liu, Liuming Liu, Peng Sun, Jiajun Wu, Zhicheng Yan, Ruilin Zhu. 2025-02-08. Lattice QCD study of $\Lambda_c \Lambda_c$ scattering. https://doi.org/10.1088/1674-1137%2Fadc11f

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